Clamp for researching face-to-face contact friction working condition

The invention discloses a clamp for researching a face-to-face contact friction working condition. The clamp comprises an upper clamp body and a lower clamp body, wherein the upper clamp body comprises an upper buckle, a cross-shaped arm and a lower buckle; the cross-shaped arm comprises a connecting block, a first connecting arm, a second connecting arm, a third connecting arm and a fourth connecting arm; the upper buckle comprises a fixed block, a first connecting foot and a third connecting foot; a threaded hole used for being fixed with the outside is formed in the center of the upper endsurface of the fixed block; the lower buckle comprises a fixed end plate, a second connecting foot and a fourth connecting foot; the lower end surface of the fixed end plate is provided with a sticking surface for sticking an upper sample; and the lower clamp body is fixedly arranged just below the upper clamp body, and a fixing groove used for being in interference fit with a lower sample to fixthe lower sample is formed