The utility model relates to a spherical hinge bearing grinding device which comprises a base, a main shaft motor, a connecting shaft, a crank motor, a crank, a sliding block and a guide rod. The spindle motor is mounted on the base, one end of the connecting shaft is connected with the spindle motor, and the other end is fixedly connected with the bottom of the spherical hinge bearing; the crankmotor is installed on the base, the crank is connected with the crank motor, the sliding block is installed at the eccentric position of the crank, the guide rod is arranged in the sliding block in apenetrating mode, the sliding block can slide along the guide rod, and one end of the guide rod is fixedly connected with a spherical hinge rod of the spherical hinge bearing. The base, the crank, thesliding block, the guide rod and the connecting shaft form a swing guide rod mechanism, the main shaft motor drives the connecting shaft to rotate, the ball socket of the spherical hinge bearing rotates along the axis of the connecting shaft, the crank motor drives the crank to rotate, and then the guide rod rotates along the axis which passes through the sphere center and is perpendicular to theend face of the crank. According to the utility model, the processing efficiency can be remarkably improved, the batch production of spherical hinge bearings can be realized by using the device, andthe installation requirements of laser inertial navigation products are met.