Nail gun structure

A nail gun structure includes a body portion including a punch portion; an air cylinder between the body portion and a swaying clamp arm， and having a telescopic rod pivotally connected with the clamp arm， the air cylinder having a piston， a first bore and a second bore disposed along an axial direction of the telescopic rod， the piston connected with the telescopic rod and reciprocating to control the communication of the second bore; and a control valve disposed between the air cylinder and the body portion， and having a tube set connected with an air source and also between the air cylinder and the body portion. When the air source and the tube set communicate with the first bore， the piston moves to allow the communication of the second bore. After the clamp arm clamping a wooden board， the punch portion punches to launch the nail.