The invention discloses an automatic evaluation machine for engine assembly and disassembly, mainly relating to the technical field of automatic evaluation. The automatic evaluation machine comprisesan engine case module, an assembly and disassembly stand module, a detection module, and an evaluation module, wherein the assembly and disassembly stand module comprises an operation board capable ofstretching and sliding relative to an inner bin, the operation board is provided with an installation panel for fixing an engine, the detection module comprises a detection board fixed at the top ofthe inner bin, a lifting table capable of moving in three axes is arranged below the detection board, a wheel disk is matched below the lifting table in a rotating manner, 3-8 torque motors are installed on the wheel disk in a circumferential direction, output shafts of the torque motors are arranged outward in a radial direction of the wheel disk, and the evaluation module comprises a control module and a time module, a storage module, an industrial camera, a dynamic torque sensor, a sleeve head, a motor unit, and a control button that are connected with the control module. The automatic evaluation machine has the beneficial effects of evaluating dexterity, accuracy and intactness level in assembly and disassembly of engines according to standards, delivering comprehensive, fair results,eliminating man-made interference factors, and having guiding value in screening of technicians.