The invention discloses an electric power metering seal performance detecting device. The device comprises a mounting base; the top of the mounting base is fixedly provided with a fixing column; a limiting groove is formed at the top of the fixing column; a movable column is slidably mounted in the limiting groove; the top end of the movable column extends to a position above the mounting base andis fixedly provided with a detecting device body set to be of a hollow structure; a first slide slot is formed in the inner wall of one side of the limiting groove; one side of the movable column isfixedly provided with a first sliding block; the first sliding block is slidably connected with the first slide slot; a limiting through hole is formed in the first sliding block; a limiting rod is slidably mounted in the limiting through hole; and the top end and the bottom end of the limiting rod respectively fixedly connected with the top inner wall and bottom inner wall of the first slide slot. The electric power metering seal performance detecting device of the invention has the advantages of high practical performance, simple structure and convenient operation. The height of the detecting device body can be quickly and conveniently adjusted, and therefore, the working difficulty of staff can be reduced, safety hazards can be reduced, and the working efficiency of the staff can be improved.