Myriad social problems and conflicts frequently erupt in the rapid urbanization,making the whole process of urbanization in high-risk operation.Social risk in the process of rapid urbanization is divided into three types:the urban-rural cleavage risk,intensified friction risk,and the imbalanced development risk.The occurrence,evolution and amplification of social risk are interacted with systematic,psychological,and institutional factors.To improve the connotation quality of urbanization,the government should formulate scientific measures of urban development,gradually release and resolve the existing problems and risks,and maintain stability of urbanization from the perspectives of taking people as the foremost,balancing urban and rural development,strengthening market forces,and optimizing urban management.