The invention discloses a shell-and-tube heat exchanger performance test device comprising a placing base and a placing groove which is arranged in the top part of the placing base. The placing grooveis internally provided with the device body. A placing plate is welded on the internal wall of the bottom part of the placing groove. The two sides of the placing plate are provided with installing grooves which are internally provided with push rod motors. Push plates are welded on the output shafts of the push rod motors. Two symmetrically arranged rotating grooves are arranged on the internalwall of the bottom part of the placing groove. Lead screws are rotatably installed in the rotating grooves. The lead screws are arranged on one side of the push plates. The external sides of the leadscrews are provided with gears. One side, which is close to each lead screw, of each push plate is provided with a gear rack. The gears are engaged with the gear racks. The two sides of the bottom part of the device body are fixedly provided with moving plates. The shell-and-tube heat exchanger performance test device has high practicality. Elevating of the device body is facilitated by the lead screws and the moving plates, different height of heat exchangers can be conveniently tested, and the dust on the device body can be conveniently removed through the slide plate and the knock plate sothat the structure of the test is enabled to be more accurate.