The invention discloses a multipurpose double-hydraulic-motor simplified driving system for a tree transplanting machine. The system comprises lifting lugs, hydraulic cylinders, a left driving system, a right driving system, riding wheel assemblies, jacking wheel assemblies and a hydraulic oil way system, wherein a cylinder body of one hydraulic cylinder is hinged with the middle of one lifting lug, the end part of a piston rod of one hydraulic cylinder is hinged with the upper end of the middle of the left driving system, a cylinder body of the other hydraulic cylinder is hinged to the middle of the other lifting lug, the end of a piston rod of the other hydraulic cylinder is hinged to the upper end of the middle of the right driving system, the multiple riding wheel assemblies are connected with the left driving system and the right driving system, the multiple jacking wheel assemblies are connected with the outer sides of the left driving system and the right driving system, the hydraulic oil way system is connected with the two hydraulic cylinders, the left driving system and the right driving system through oil ways, symmetrical arrangement is adopted, arrangement of a gearbox is avoided, the weight is reduced, and the internal diameter size occupied by a transmission system is reduced; barks are prevented from being broken, and the completeness of the tree after digging is improved; the universality is better, and the centering performance is high; and the transplanting survival rate is high.