Auxiliary device applied to detecting negative clearance of bearing and detection method

The invention discloses an auxiliary device applied to detecting the negative clearance of a bearing and a detection method, used for conveniently and quickly measuring the negative clearance of the bearing, and the measurement accuracy is relatively high. The device comprises multiple spaces with the same thickness uniformly distributed on the same circumference. The detection method for the negative clearance of the bearing is characterized by comprising the following steps of placing the multiple spaces uniformly arranged along the circumferential direction between the outer rings of the two bearings or the inner rings of the two bearings, and ensuring close contact between the spacers and the end faces of the inner rings of the bearings or the end faces of the outer rings of the bearings; fixedly connecting the outer rings of the two bearings or the inner rings of the two bearings via bolts; and measuring a bearing clearance value G1 after the spacers are added, wherein the actualnegative clearance value