The invention provides a rotating mechanism of a bearing platform for detection, and a base platform is fixedly arranged on the rotating mechanism; the rotating mechanism comprises a motor which is controlled by a rotational screw rod, a sliding block of which one end is fixedly connected to the screw rod and slides on a sliding rail, a connecting rod of which one end is pivoted to the sliding block, and a crank handle; one end of the crank handle is pivoted to the other end of the connecting rod, the other end of the crank handle is fixedly connected to the bearing platform; wherein when the motor acts on, the screw rod rotates to push the sliding block to slide on the sliding rail, so as to lead the connecting rod to be rotated relative to the sliding rod in a pivoting way and cause the crank handle and the bearing platform to rotate with an angle at the same time relative to the base platform.