The embodiment of the invention provides a containing piece, a
pump head and a pressure pump, and relates to the field of
medical instruments. The problems that in an existing infusion pressure pump,dust easily enters a pump body, and a telescopic rod stretches out and draws back to injure people are solved. The containing piece is used for being connected to the exterior of a pump body, the pumpbody is provided with a containing cavity used for containing a
piston rod, the containing piece is provided with a sliding channel used for being communicated with the containing cavity, and the sliding channel is used for enabling the free end, stretching out of the pump body, of the
piston rod to stretch in. The
pump head comprises the pump body and the containing piece. The pressure pump comprises the
pump head. The containing piece is connected to the outer portion of the pump body, the sliding channel in the containing piece is communicated with the containing cavity, the free end, stretching out of the containing cavity, of the
piston rod stretches into the containing cavity, in the reciprocating movement process of the
piston rod, the containing piece has the dustproof effect on the free end of the
piston rod, and external dust is prevented from being brought into the pump body in the stretching and retracting process of the free end of the
piston rod. And meanwhile, the containing piece further has a protection effect on the free end of the piston rod, and personal injury to people in the telescopic process is avoided.