To solve the problem that the existed scheme of synchronized control of multi-motor is difficult to meet the requirements of high precise synchronized control and the limitation that it can not achieve proportional synchronized control, a belt PI compensative control of the improved Relative Coupling Control structure was proposed, which can apply to completive synchronized control and proportional synchronized control for multi-motor. As to the problem that the Permanent Magnet Synchronous Motor (PMSM) is a multivariable nonlinear system with strong coupling, an adaptive fuzzy sliding mode controller was designed to control the PMSM. The synchronized control simulation mode of four PMSM was set up. Compared with fixed gain compensative control structure, simulation results illustrate that this new structure has higher synchronized control accuracy. Compared with PID and conventional sliding mode control strategy, this fuzzy sliding mode control strategy has a better synchronized stability behavior and stronger robustness.