The invention discloses a lycium chinense mechanical weeding machine, which comprises a frame body, left weed shoveling plates, right weed shoveling plates, a central weed shoveling plate, a left walking wheel, a right walking wheel and a soil crushing roller; the left weed shoveling plates and the left walking wheel are mounted on the left end of the frame body, the right weed shoveling plates and the right walking wheel are mounted on the right end of the frame body, the central weed shoveling plate is mounted on the rear end of the frame body, and is located at the lower right side of the left weed shoveling plates and the lower left side of the right weed shoveling plates, and the soil crushing roller is mounted on the rear end of the frame body and is located at behind the central weed shoveling plate. A tractor is adopted to match with a traction frame of the weeding machine, weeds between two rows of lycium chinense plants are better shoveled through the left weed shoveling plates, the right weed shoveling plates and the central weed shoveling plate, large soil blocks, shoveled up by the left weed shoveling plates, the right weed shoveling plates and the central weed shoveling plate, are crushed by the soil crushing roller, so that a soil moisture conservation effect is well realized; by adopting the lycium chinense mechanical weeding machine provided by the invention, mechanical weeding in a lycium chinense field can be realized, the mechanical weeding effect is relatively good, labor cost is greatly reduced, and the planting cost of lycium chinense is reduced.