A clamp, comprising: a base; a clamp body connected to the base, wherein the clamp body comprises a first half clamp body and a second half clamp body, each of the first half clamp body and the second half clamp body is rotatably connected to the base, and the first half clamp body and the second half clamp body are adapted to cooperate with each other to clamp an object; and a driving assembly connected to the first half clamp body and the second half clamp body through a connector, wherein the driving assembly is adapted to drive the first half clamp body and the second half clamp body through the connector to rotate and approach or separate from each other, the connector comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the first half clamp body, and one end of the second connecting rod is rotatably connected to the second half clamp body; the driving assembly comprises a driving unit and a pushing unit, the other end of the first connecting rod and the other end of the second connecting rod are both rotatably connected to the pushing unit, and the driving unit is adapted to drive the pushing unit to reciprocate in a direction perpendicular to an axial direction of the object, so that the first connecting rod and the second connecting rod drive the first half clamp body and the second half clamp body to rotate to approach or separate from each other, the pushing unit comprises a pushing rod and a U-shaped frame, the U-shaped frame comprises a bottom edge and two side edges connected to the bottom edge respectively, one end of the pushing rod is connected to the driving unit, and the other end of the pushing rod is connected to the bottom edge of the U-shaped frame; and the other end of the first connecting rod is rotatably connected to one of the side edges of the U-shaped frame, and the other end of the second connecting rod is rotatably connected to the other side edge of the U-shaped frame, characterized in that the first half clamp body and the second half clamp body are arranged symmetrically, and the pushing rod is arranged along a symmetry axis of the first half clamp body and the second half clamp body and is connected perpendicularly to a midpoint of the bottom side, and a distance between the two side edges is greater than a width of the first half clamp body and the second half clamp body in a closed state. a base; a clamp body connected to the base, wherein the clamp body comprises a first half clamp body and a second half clamp body, each of the first half clamp body and the second half clamp body is rotatably connected to the base, and the first half clamp body and the second half clamp body are adapted to cooperate with each other to clamp an object; and a driving assembly connected to the first half clamp body and the second half clamp body through a connector, wherein the driving assembly is adapted to drive the first half clamp body and the second half clamp body through the connector to rotate and approach or separate from each other, the connector comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the first half clamp body, and one end of the second connecting rod is rotatably connected to the second half clamp body; the driving assembly comprises a driving unit and a pushing unit, the other end of the first connecting rod and the other end of the second connecting rod are both rotatably connected to the pushing unit, and the driving unit is adapted to drive the pushing unit to reciprocate in a direction perpendicular to an axial direction of the object, so that the first connecting rod and the second connecting rod drive the first half clamp body and the second half clamp body to rotate to approach or separate from each other, the pushing unit comprises a pushing rod and a U-shaped frame, the U-shaped frame comprises a bottom edge and two side edges connected to the bottom edge respectively, one end of the pushing rod is connected to the driving unit, and the other end of the pushing rod is connected to the bottom edge of the U-shaped frame; and the other end of the first connecting rod is rotatably connected to one of the side edges of the U-shaped frame, and the other end of the second connecting rod is rotatably connected to the other side edge of the U-shaped frame, characterized in that the first half clamp body and the second half clamp body are arranged symmetrically, and the pushing rod is arranged along a symmetry axis of the first half clamp body and the second half clamp body and is connected perpendicularly to a midpoint of the bottom side, and a distance between the two side edges is greater than a width of the first half clamp body and the second half clamp body in a closed state.