With development of economical integration process and coming of knowledge economy, China will open home market gradually, competition of high-tech is becoming fierce, and Chinese enterprises are facing competition without national boundaries.

Based on usual circuit,this paper analyzed the critical competition in the design of electric appliance control of circuit with contact.

In this paper, the following problems have been discussed, which were the characteristic of enterprise self organization and critical condition, the conditions of making choice of critical competition strategy, some principles and steps.

The disordered competition situation and reasons of Nixing pottery were analyzed in detail in this paper, and the measures were given.

By analyzing the competitions among some medium and small-sized enterprises, this paper finds that the independent mode of tree-shaped sales channel is the major course resulting to the disordered competition.

The disorder competition among subordinate companies of decentralized group always gets into the prisoner dilemma,so the companies need group s help to restrain the behavior of subordinate companies and get rid of the crisis.