Firstly this paper demonstrated that joint venture is an important part of industrial economy of our country relied on the discussion in five respects. Next the whole industial enterprises of our country was regarded as three systems:the whole industrial enterprise system, the joint venture system and other enterprise system. Then the paper demonstrated, according to the whole quantity analysis about Industrial Output Value and its share in whole industry as well as the Growth Rate of Industrial Output Value and its share in whole industry for three systems，that the development of joint venture is meaningful for the industrial economy growth of our country．According to the evaluation and comparison about technica1 leve1 and its growth rate for three systems，the paper demonstrated that the raising of technical 1eve1 of joint enterprise places an important role in the improvement of technology of the whole industry，the technical progress of joint adventure has effected promotion for the technical progess of our industry．