The intrinsic relationship between social security expenditure and economic growth has always been discussed in the field of social security research.Firstly,this paper discusses the social security expenditure composition of China as well as some western countries and regions,and expounds the current situation of social security level in China.Secondly,this paper selects related economic data from 1978 to 2016,and analyzes the dynamic relationship between them by using the econometric model,and it's confir...