Aiming at the problem that the output force of the active suspension of linear motor is relatively small， the hybrid active suspension structure and multi-mode coordinated switching control strategy are designed. The global search ability and local development ability of the gravity search algorithm are improved by dynamically adjusting the gravity constant， which solves the problem that the gravity search algorithm is prone to premature convergence and falling into local optimization The fitness function is set up according to the different control objective， and the weighted coefficients of linear quadratic gaussian （LQG） control are optimized by using the improved gravity search algorithm. The optimal control currents of the electromagnetic hybrid active suspension at different vehicle speeds are analyzed and determined； the current switching controller is designed， and the vibration reduction performance of the suspension is simulated and analyzed. The simulation and test results show that compared with the LQG control， the root mean square value of the spring load mass acceleration at low speed and the dynamic tire load at high speed is reduced by 31.09% and 32.20% respectively， the root mean square value value of the mass acceleration of the spring and the dynamic load of the tire are reduced by 25.28% and 23.56% respectively， and the control strategy can effectively improve the ride and handling stability of the vehicle.