Down lamp mounting, fixing and inspecting jig

A down lamp installing, fixing and inspecting jig comprises a jig body, a down lamp installing hole is formed in the upper end face of the jig body, and a lamp pole part of a down lamp to be inspectedis inserted into the down lamp installing hole. Four crescent-shaped blades are arranged on the upper portion, the lower portion, the left portion and the right portion of the down lamp installationhole respectively, and meanwhile the inwards-concave curved surfaces of the four crescent-shaped blades are aligned with the circle center of the down lamp installation hole. Linear sliding grooves are correspondingly formed in the positions, below the blades, of the jig body, sliding blocks are movably arranged in the linear sliding grooves, supporting rods are arranged at the bottoms of the blades, and the supporting rods are connected with the sliding blocks. The four crescent-shaped blades arranged on the down lamp mounting, fixing and inspecting jig designed by the scheme can be spliced with one another to form an