Abstract: Three-phase grid-connected inverter is an important link between the new energy system and the power grid.To solve the problems of poor steady-state performance and insufficient control accuracy caused by saturation of proportional integral（PI）controller in traditional voltage and current double closed loop grid-connected control,a model predictive control strategy for the three-phase grid-connected inverter was proposed.The mathematical model of three-phase inverter in two-phase static coordinate system was established,the control process predicted by the model was analyzed,and the objective function was optimized to increase the current limiting link of the inverter.The discrete dynamic current equation was established to predict the current value at the next time.The optimal space voltage vector was selected according to the principle of minimum objective function,and its corresponding switching state was applied to the inverter to realize grid-connection control. The feasibility of the model predictive control strategy was verified by MATLAB/Simulink simulation.The proposed control strategy improves the steady-state performance of the grid-connected process and effectively reduces the harmonic distortion of the grid connected current.