Abstract:Trust works as an important social mechanism to reduce social transaction costs,maintain social order,and enhance self-identity and integration of society.Interpersonal trust,organizational trust and political trust constitute the foundation of identity construction,social capital and political identity.The increased social mobility and social interest differentiation destroyed the structure of traditional social trust in modern society.New generation migrant worker is a special group in transition period which gets trapped in the lack of interpersonal trust,organizational trust and political trust.When the trust rift can’t be repaired in time and new social trust system is not fully established,the new generation migrant workers fall into the predicament of the identity construction and political identification.