With the development of computer and multimedia technology, social media platforms are widely used in various fields, so this paper introduces the design of network multimedia platform in the human resources management system, and designs a kind of new human resources management computer system. In order to improve the level of human resource management, it can introduce more talents and rational allocation human resources for enterprises, so we must improve the user generated content quality of social networking platform, eliminating spam behavior, and improving the social network human resource platform reputation. This paper establishes the security mechanism related mathematical model of social network human resources system. Through the VB programming control, it can implement the security of social network content, the automatic removal of rubbish short message and the optimal audit mechanism of system human resource management, which provide innovative solutions for the enterprise human resource management.