In this paper, analyze the motion rules of multiple-spindle linkage motion in machining complex ruled curved surfaces by WEDM. Sum up the motion parameters and motion types in machining various complex surfaces by WEDM. According to the basic principles of the forming of ruled surface in spatial analytic geometry, establish five-spindle linkage motion cutting system. Prove the correctness of the mathematics models by means of computer simulating. In turn, verify the correctness of the computer simulating by machining simple parts. Therefore, give the theoretical base for the application in production. Solve the problem in cutting parts with complex surfaces and widen the range of processing complex surface by WEDM. This method gets better application in model manufacture.