The invention discloses a grouting gun head. The grouting gun head comprises a shell with a fixed table at the upper end, and a fixed flange is arranged at the upper end of the fixed table, a groutingpipe is inserted into the center of the fixed flange, and the grouting pipe is fixed with the fixed flange through a fastener; an upper rubber ring, an upper plug, a lower rubber ring and a lower plug are sequentially arranged inside the shell from top to bottom, supporting rods are arranged between the fixed flange and the upper rubber ring, and the supporting rods are located on the outer sideof the grouting pipe; movable pull rods penetrating through the upper rubber ring is arranged at the top end of the upper plug, the top ends of the movable pull rods are provided with a crosspiece, and connecting rods are arranged between the upper plug and the lower rubber ring; the upper rubber ring, the upper plug and the lower rubber ring sleeves the grouting pipe correspondingly and can slideup and down along the grouting pipe, the lower plug is fixed at the lower end of the grouting pipe, and a plurality of grouting holes are formed in the grouting pipe and the shell correspondingly. The grouting gun head is good in sealing effect, high in stability during operation, and disassembly and cleanness are easily carried out.