Hydraulic plunger pump cylinder

The utility model relates to the technical field of a plunger pump cylinder body which is designed for adapting to powder metallurgy-manufacturing, cost-reducing and production-enhancing efficiency. Splines are arranged in an inner hole of the cylinder body, and a plurality of holes are equally arranged along an outer circle of the inner hole of the cylinder body, and a different shape hole is arranged on the lower part of the utility model. The utility model is characterized in that splines are fully arranged in the inner hole of the cylinder body from top to bottom, and the lower parts of a plurality of holes which are equally arranged are provided with a mould-release pitch and the quantity of the holes is between 7 and 9. The utility model has the advantages that the manufacturing efficiency is high while the manufacturing cost is low; the manufacturing procedure is less; the scale manufacture can be realized. The utility model is suitable for being popularized and applied on plunger pumps.