This work suggests an adaptive weighted control approach combining repeating proportional control and sliding mode variable structure control to address the needs of rapidity and anti-disturbance of three-phase grid-connected inverter in transient energy feedback. Both the state equation for the filter and the mathematical model have been solved. The inverter's stability is increased by repetitive proportional control, and the role of the sliding mode switch is replaced by the high-frequency controller. Small control chattering, followed by real-time weighted controller adjustment of the weight ratio of the two controls in accordance with the current error value to produce stable transition and switching of the two controls to produce high-quality grid connection. Finally, using simulink software, the PI control, sliding mode variable structure control, and weighted control of the two are simulated under the identical conditions. The employment of the weighted control method enhances the tracking properties of the equivalent control, which not only speeds up the system but also improves its accuracy. The adaptive weighted control may significantly increase the system's resilience and control accuracy, and the reaction speed can suppress the harmonics of the grid-connected current.