Punching device

The utility model belongs to the technical field of aircraft manufacturing, and discloses a point punching device which comprises a base, a positioning piece and a point punching assembly. A mounting hole is formed in the base, and the mounting hole is configured to contain a to-be-punched point piece; a positioning hole is formed in the positioning piece and is coaxial with the mounting hole; the point punching assembly comprises a first sleeve and a point punching piece. The first sleeve coaxially penetrates through the positioning hole; the point punching piece comprises a rod part and a head part, the head part is arranged at one end of the rod part, the other end of the rod part is a punch, the rod part penetrates through the first sleeve, the length of the rod part is larger than that of the first sleeve, the length difference is the depth of a concave point to be punched, and the size of the head part is larger than the inner diameter of the first sleeve. When the point punching device is used for punc