The invention relates to a plunger cylinder, a pumping system swing valve mechanism and concrete pumping equipment. The plunger cylinder comprises a plunger rod, a cylinder barrel and a cylinder bottom, wherein the cylinder barrel is provided with a first end and a second end; the plunger rod is movably sleeved in an inner cavity of the cylinder barrel from the first end of the cylinder barrel and is tightly attached to the side wall of the cylinder barrel; the cylinder bottom is located at the second end of the cylinder barrel; the plunger cylinder is provided with an oil opening and a first oil channel which enables the oil opening and the inner cavity to communicate; and the plunger cylinder is further provided with a throttling oil channel, and the throttling oil channel and the first oil channel are connected between the oil opening and the inner cavity in parallel. The plunger rod can block the first oil channel while retracting under stress so that hydraulic oil of the inner cavity can flow towards the oil opening after being throttled mainly by the throttling oil channel, and then buffering of the plunger rod is achieved through throttling on the hydraulic oil; and the hydraulic oil at the oil opening is supplied to the inner cavity mainly through the first oil channel in the outward extension process of the plunger rod, and accordingly normal operation of the plunger rod is achieved.