This third-generation LCIA gravity shuttle material truck is a non powered, low-cost automated material transfer equipment designed specifically for manufacturing assembly lines. The whole vehicle adopts the third-generation aluminum alloy lean tube as the main frame, relying on the gravity mechanical rebound structure, without the need for electricity or gas source, relying on the self weight of materials to achieve automatic forward movement of the car and automatic return of the empty car, perfectly realizing uninterrupted cyclic feeding between workstations. The equipment is designed with low investment, maintenance free, and high stability, specifically for the transportation of small and medium-sized components. It significantly reduces manual handling actions and optimizes production line operation rhythm, making it the core logistics tool for lean production and factory cost reduction improvement.