Abstract: According to the complexity of the mechanical structure of traditional fly frame, analyses the forming principle of roving winding, and put forward the overall design scheme of multi-motor drives fly frame, cancelled multifarious mechanical structure, and its corresponding function is controlled by computer, analyses several motor three winding mathematic model, the method established by the mathematical pattern of the motor speed changing and roving winding shaping mathematical pattern parameters are given, the influence of yarn tension trend line, especially from the point of view of the actual use of the area, the ideal reversing forbid it realized the commutation of the mathematical model including size yarn forbid it before, and reversing for different provide a guarantee of good shape, with four motor drive for both divisions are introduced with both traditional fly frame parameters adjustment method, both the difference of electrical fly frame and traditional fly frame can be conveniently set, change the parameters, transform the roving varieties, has high practical value.