A blow molding machine head

The invention discloses a blow moulding machine die head, which comprises a material storage barrel, wherein the material storage barrel is provided with a cavity with an open bottom end; a material storage core is arranged in the cavity of the material storage barrel in the axis direction; a material ejection piston and an outer layer sleeve are sequentially arranged on the outer side of the material storage core in a sleeving manner. In the outer layer sleeve, the thickness of a clearance between a cylinder I and the inner wall of the material storage barrel is smaller than the thickness of a clearance between a cylinder II and the inner wall of the material storage barrel. After entering from a second feed inlet, the plastic fluid flows in a space formed by the cylinder I and the material storage barrel at a certain speed, and when the plastic fluid enters the space formed by the cylinder II and the material storage barrel, since the clearance is increased, the flow speed of the plastic fluid is reduced and a second flow passage space is uniformly filled with the plastic fluid, therefore, the situation that the plastic fluid entering the material storage space is uniform and continuous is ensured.