Plunger pump crankcase and plunger pump

The utility model provides a plunger pump crankcase and a plunger pump, and the plunger pump crankcase comprises a box body, a piston rod, a piston rod and a piston rod, the crankshaft is rotatably mounted in the cavity, and one end of the crankshaft extends out of the box body to form a connecting end used for being connected with an external driving component; the connecting rods are located in the cavity and arranged in the length direction of the crankshaft at intervals, and one end of each connecting rod is movably installed on the crankshaft; the plurality of plungers are in one-to-one correspondence with the plurality of connecting rods, the inner end part of each plunger is movably connected with the other end part of the corresponding connecting rod, a plurality of plunger holes corresponding to the plurality of plungers are formed in the side part of the box body, each plunger is movably mounted in the corresponding plunger hole, oil seals matched with the plungers are arranged on the outer end surf