Abstract
After over 20 years state ownership enterprise reform and economic reform, China is experiencing a large change in social security system. And expansion of regional economic gap and local government's power caused unique features of the present social security system. Referring to the comparative theories of social security regime, this paper discusses about the features of chinese social security system in planned economy period and the trend of present social security system reform. For catching the features of present changing social security system, I will use the concept of local corporatism. At planned economy period Danwei was the most important unit for social security in cities. Now social security function of Danwei has become weaker. Along with the expansion of local government's power, the formation of local corporatism has become universal phenomenon in china. As the local authority of the region, local government's role has become very important for regional social security. And the initiative of local government will give it's great effect. This is the biggest feature of the present changing social security system and the casuse of regional gap in social security. Because the formation of local corporatism is not a mere transitory phenomenon, it already has become a persistant and prevailing institusion, the local government's effect on regional social security will go on make a persistant feature. otherwise family care will become more important in future.
