1Analysis Floating PopulationAbstract With the acceleration of the process of reform and opening up, the floating population greatly increased, along with the Floating Population Crime has become the focus of attention. Current research concepts, research, position and other aspects of the problem there is a certain deviation, led directly to the researchers and wrong understanding and attitudes of ordinary residents of the city of the floating population, which further lead to an increase in crimes committed by migrants In this paper, the analysis of the concept of crimes committed by migrants and reasons, to explore the floating population crime control within reasonable limits preventive measures. Paper Keywords Floating Population Crime causes of crime prevention and control measures Stage, China is in a period of social transformation in the socio-economic, political, cultural and other aspects of development toward the modern at the same time, along with the various social contradictions and problems of frequent relative to other traditional criminal 2phenomenon, Floating Population Crime in this particular period that best reflect the status of the development of society. Floating Population Research can be found in The Social factors of disharmony, analyze the causes and look for a solution, to find the best social prevention and control management measures to achieve the smooth transition of society. , The concept of floating population Criminology is the study of criminal phenomenon, the development of characteristics, causes and laws, as well as measures to prevent and reduce crime science. Prevention, Control of Floating Population fundamental purpose is the study of the floating population crime phenomenon, but the current population figures large, the main complex types, in all mobile personnel shall not be included in the scope of the study of the floating population is both unrealistic and unscientific. First, rule out the duties of the floating population, and secondly, the people who commit crimes perpetrators included in current Population Crime is incorrect, this distinction is that the flow of surface phenomena just fled the criminal use of the tool, rather than causing fled crime. 3From this we can from the point of view of the Criminological Research of the floating population a basic definition, that in order to legitimate economic purpose, leaving the domicile or regular residence staff. Second, the crimes committed by migrants characteristics (Behavioral characteristics Crime characteristics of the floating population is in the process of social transformation, the floating population crime has some as a sign or signs of criminal behavior characteristics. Mainly as follows: 1. Usurpation of criminal activities Most of the floating population of migrant workers, for the purpose of getting rich in the floating population in criminal activities, the economic benefits for the purpose of crime accounted for most. 2. Violent criminal activities The performance of violent criminals to carry out criminal acts of violence or threats of violence, regardless of the consequences, as only a moments pleasure, generally more cruel criminal 4means. (B organizational characteristics The transition period of social transition crimes committed by migrants organizing feature is mainly manifested in the crime gang growing. Relatives, fellow, city unscrupulous criminals and foreign personnel or between like-minded foreign personnel form gang. floating population criminal gangs are relatively stable criminal gangs, extremely negative impact on the social stability of the social transition. (Three main characteristics 1. The complexity of the subject of crime of The main characteristics of the crimes committed by migrants first performance as the complexity of the subject of crime. Currently, There are three types of floating population crime members constitute substantially negative case the run and the imprisonment or detention at large. “Escape” staff. Arrest fugitives, staff. “four noes” in the floating population of the city staff. proof of identity, no fixed job, no fixed abode, no fixed income staff. dropped out of the minors. 52. The younger age of the subject of crime The main characteristics of the crimes committed by migrants another outstanding performance for the younger age of the members of the criminal floating population, mostly young people, many of them are minors. Third, the floating population causes of crime (Social reasons 1. Urban and rural areas are isolated from each other closed social structure is broken Reform and development, due to the rapid development of the market economy, the traditional urban and rural isolation is broken, a large number of rural to urban migration workers, greatly increased the degree of social mobility from a sociological point of view, the increase of floating population, social mobility degree of improve socia