The utility model relates to a clamp and a transfer device. The clamp comprises a base; the bearing plate and the base are arranged in a stacked mode in the vertical direction. Locking assembly, the bearing plate is connected with the base through a locking assembly. The locking assembly comprises a first locking part arranged on the bearing plate and a second locking part arranged on the base, the bearing plate can move in the vertical direction and is connected with or separated from the base through the locking assembly so that the bearing plate can be connected with or separated from the base, and horizontal loads can be transmitted between the bearing plate and the base through the locking assembly; the clamping assembly is arranged on the surface, back on to the base, of the bearingplate, the clamping assembly comprises a first clamping jaw and a second clamping jaw which are arranged in the first horizontal direction at intervals, the first clamping jaw can be horizontally andmovably connected to the bearing plate, and the first clamping jaw can get close to or get away from the second clamping jaw so that the first clamping jaw can be switched between the clamping position and the opening position. According to the clamp, the transfer working efficiency can be improved, and the labor intensity is reduced.