Novel liquid pump head

The novel liquid pump head comprises an upper cover and a push rod, a pump head inner cylinder is connected to the middle of the lower end of the upper cover, an air hole is formed in the upper portion of the pump head inner cylinder, the lower end of the push rod penetrates through the middle of the upper cover and then is inserted into the pump head inner cylinder, the lower end of the push rod is connected with a suction head, and the push rod is sleeved with a return spring located above a piston. The bottom of the pump head inner cylinder is connected with a pump head which is internally provided with a bead of a one-way valve. The suction stroke in the pump head inner cylinder is increased, the capacity of the pump head inner cylinder is increased, and meanwhile, the return spring is arranged above the push rod, so that the suction force of the pump head inner cylinder can be increased. And a bead of a one-way valve is arranged at the bottom of the inner cylinder of the pump head, so that liquid backflo