The invention discloses a production and machining method of a plunger pump for a high-quality high-pressure cleaning machine. The production and machining method comprises the following steps that (1) incoming material detection is conducted, specifically, size measurement is conducted on accessories, and sampling detection is conducted on the sealing performance between a plunger and a pump headthrough sealing detection equipment; (2) deburring is conducted, specifically, burr and flash are scraped off through a triangular scraper shaft hole; (3) cleaning is conducted, specifically, particulate matter is taken out; (4) crankcase assembly is conducted; (5) pump head assembly is conducted; (6) pump head and crankcase assembly is conducted, specifically, a digital display torque wrench isadopted for fixing; (7) testing is conducted, specifically, testing can be conducted by injecting oil liquid into a crankcase, the oil temperature, the pressure, the flow and the state of the pump aremonitored, and pump calibration records are filled in; and (8) numbering and warehousing are conducted, specifically, the calibrated pump is numbered, labeled, subjected to surface cleaning and finally warehoused. According to the production and machining method, the using quality is effectively ensured, the service life is greatly prolonged, and the pressure is stable and reliable.