High-pressure plunger type diaphragm pump can support a maximum of 8Mpa, 800 meters head of all kinds of positive and negative electrode material slurry, paint, ceramic glaze slurry, dyes, inks, slurry, high pressure hot water and other fluids conveyance. As the diaphragm separates the material and the plunger, one end of the diaphragm is the high-pressure fluid, one end is the plunger, the pressure balance between the two sides, the diaphragm is only left and right vibration and does not pull, the stroke is less than 15mm, there will not be a pneumatic pump diaphragm quickly damaged. Can achieve a very stable flow of high-pressure fluid delivery, diaphragm vibration stroke <15mm, the accuracy can reach 5 ‰, can be used as a high-pressure metering pump.