The utility model relates to a public facility building structure and in particular relates to a cast-in-place pile punching structure. The head of a punch is cone-shaped; oblique iron pieces are arranged on the two sides of the head of the punch; the section of each oblique iron piece is a right triangle, and the angle of one acute angle of the oblique iron piece is equal to the taper of the head of the punch; a crow bar which is cylindrical is arranged outside each oblique iron piece, a flat cake-shaped part is arranged on the tail of the crow bar and fitted with the bottom of the corresponding oblique iron piece, an obtuse angle in the range of 150 to 170 degrees is formed between the crow bar and the cake-shaped part by bending, and a movable sliding rod penetrates through the middle parts of the crow bar and the oblique iron piece. The cast-in-place pile punching structure has the characteristics of simple structure, relatively low construction cost, low material consumption, high stone breaking speed and the like.