Sealing performance detection device

A sealing detection device belongs to the field of oil production engineering. A sealing performance detection device comprises a screwed plug a, a cylinder body, scales, a crossover coupling a, a transparent observation pipe, a traveling valve, a crossover coupling b and a lateral joint. A screwed plug a is arranged at the upper part of the cylinder body, the outer wall of the cylinder body is connected with one end of a conversion joint a, and the other end of the conversion joint a is connected with a transparent observation pipe; the other end of the transparent observation pipe is connected with a conversion joint b; the conversion joint b is connected with a screwed plug b; a graduated scale is arranged on the transparent observation tube, and a traveling valve is arranged in the middle of the lower portion of the graduated scale. The device has the beneficial effects that the problem of detecting the sealing performance of each connecting part of the pipe and the rod is effectively solved, the leakage