Coupling rigidity test bed

The utility model provides a coupling rigidity test bench, which comprises an outer frame, a lifting mechanism, a radial loading mechanism, a roll mechanism and a horizontal loading mechanism, the lifting mechanism, the radial loading mechanism and the roll mechanism are arranged in the outer frame, the horizontal loading mechanism is arranged above the roll mechanism, and a roll fixing device is arranged below the roll mechanism. The side inclination fixing device comprises a driving device and a clamping block which are installed at the bottom of the outer frame, the side, facing the side inclination mechanism, of the clamping block is provided with an inclined face, a side inclination plate is further fixed to the bottom of the side inclination mechanism, and the middle of the side inclination plate protrudes towards the bottom of the outer frame to form a protruding part. The side tilting plates are symmetrically inclined from the protruding parts to the two sides of the bottom of the side tilting mechani