“The Interim Measures for the Transfer and Continuation of the Basic Pension Insurance Relations of Urban Employees” cannot get out of the system trap, unfair trap and low-level trap of the social security, on the contrary, brings about the migration trap and kick-a-ball trap. These traps do not result from the migration of population and social security, but from the social security model, the current financial systems and related policies as well as huge disparity of regional socioeconomic development. In order to get rid of these traps and to achieve the free movement of population and social security, we should establish a flexibly unified national social security system as a thread, reinforce the network-based information construction of social security as a understructure, improve the overall level of social security as a thrust, bridge the social security system between urban and rural areas as a breakthrough, make and perfect the policies for transfer payment for equalized services of social security as a hold, and gradually accomplish the social security system with “universal coverage, flexibly unified, equilibrium services, free movement, sustainable development” as a final goal.