Compound mechanical stress cell loading device for simulated joint cavity

The compound mechanical stress cell loading device for simulated joint cavity includes a shear force module, a pull/compression stress module and an impulse force module. The shear force module has linear motor to drive slide plate parallel to the bottom of the culture cavity for reciprocation to generate pulsate fluid shear force; the pull/compression stress module has linear motor to drive the annular pressing head for reciprocation to stretch the silica gel film in the bottom of the culture cavity and to generate periodical pull/compression stress; and the impulse force module has linear motor to drive the rammer head for impacting the bottom of the culture cavity to generate periodical impulse force. The present invention simulates the mechanical stress the synovial membrane tissue bears under physiological condition and has the features of high controllability, simple operation, high precision, small error, etc.