The invention relates to the technical field of a module detecting accessory device, in particular to a strength detecting device for a LCM liquid crystal module. The device can easily control the height of each free fall, reduce errors, and improve the use reliability; and the device is convenient to fix a model machine before the free fall, reduce the angular deviation, and reduce use limitations. The device comprises a test plate, further comprises a base, a front positioning plate, a rear positioning plate, a limiting plate, a positioning block, a set of pulling rods, and a pulling handle,and further comprises a set of adjusting threaded pipes, a set of adjusting threaded rods, a set of positioning wheels, a set of fixing rings, a set of moving rods, a set of limiting plates, a set ofconnecting rods, a rotating threaded rod, and a set of moving threaded pipes. A set of positioning shafts are respectively disposed at the bottom end of the set of adjusting threaded pipes, and a rotating plate is disposed at the central area of the outer wall of the rotating threaded rod.