Social security fund is a national social security system, which plays an irreplaceable role in safeguarding social equity, promoting social stability and promoting economic development. The legal system construction of social security fund management in China started late, and there are still some problems such as imperfect legislation, backward supervision mechanism and insufficient fund appreciation ability. To establish and improve China's social security system, we must establish a clear, scientific and reasonable social security fund supervision and management system through legal agreement, ensure the allocation and supervision of social security funds, improve system construction, improve fund investment efficiency, and change the situation of empty account operation of social security funds in China. Therefore, this paper discusses the above problems in four parts.

The first chapter of this paper summarizes the background and significance of the research, puts forward that the purpose of the research is China's fund supervision system, analyzes the current situation and existing problems of social security fund supervision, and puts forward some countermeasures to solve these problems. In addition, it also introduces the research status of social security fund supervision, introduces the supervision system of social security fund in the United States, Britain and Germany in detail, and discusses how to solve the problems existing in fund supervision.

The second chapter is the concept of social security fund, which expounds the basic principles of social security fund supervision.

Chapter III The main body of fund supervision includes the supervision of state power organs and administrative supervision, the supervision of specialized supervision institutions and internal control, judicial supervision and social supervision. State power supervision, administrative supervision, internal supervision, special supervision, judicial supervision and social supervision constitute China's social security fund supervision system. This paper analyzes the lag of legislation related to social security fund supervision, and the problems of over-reliance on administrative supervision, absence of administrative supervision mechanism, imperfect fund supervision mechanism, and preservation and appreciation of social security fund.

The fourth chapter, aiming at the above problems, puts forward some suggestions on perfecting the supervision of social security funds from the legal system, optimizing administrative supervision, perfecting the social supervision system, perfecting the supervision mechanism of social security funds' investment and operation, establishing the market-oriented mechanism of funds, and improving the supervision ability of funds' preservation and appreciation.