The invention, which belongs to the technical field of mechanical assistance of oil recovery, discloses a method for installing a bearing end cover of a motor. The method comprises: step one, detachable connecting rods are installed in two mounting holes of an inner end cover respectively; step two, an outer end cover is aligned at the inner end cover and sleeves the detachable connecting rods through mounting holes formed in the outer end cover; step three, the outer end cover is knocked to realize close combination of the outer end cover with the inner end cover; and step four, the detachable connecting rods are dismounted and fixed bolts are installed. The detachable connecting rods installed at the inner end cover plays a role in supporting and guiding the outer end cover, thereby avoiding displacement of the inner end cover; and the installation operation of the end cover of the motor bearing is simplified and the installation efficiency of the end cover of the bearing is improved. Moreover, even though displacement of the inner end cover occurs due to vibration, the inner end cover can return to the original position by dragging the detachable connecting rods, so that the mounting efficiency of the end cover of the motor bearing is improved effectively.