According to the characteristics of two software Labview and Matlab, this paper presents a co-simulation method of Labview and Matlab. This method will combine the advantages of both software by mixing programming and co-simulation. Through the example of Direct Torque Control (DTC) fuzzy controlling, this paper introduces the design of the fuzzy controller in the Labview, and describes a method to build a co-simulation platform, at last simulating this system. The result shows that the two software can implement the mixed programming well, and it can achieve good results in both Human-Machine Interaction and the simulation efficiency.