The present invention relates a simple structure, no pollution, high pressure, high efficiency, is a long life, to provide oil-free high-pressure plunger pump that can operate even without any of the lubricating oil or grease. A oil-free high-pressure plunger pump, the pump head is mounted to the pump body, at least two plunger pressure increase mechanism is mounted to the pump body moved by the main shaft 40. The plunger pressure increase mechanism, parallel cross-link 31 with a gap, and arranged coaxially to said main shaft, one end of the link is fixed to the outer ring of the bearing 50, the inner ring of the bearing in the spindle It is secured to a fixed eccentric sleeve 60, the other end of the link being hinged to the plunger 70. Further, the plunger is mounted in the hollow portion of the pump body, a self-lubricating plunger sleeve 80 is provided between the pump body and the plunger, the contact portion between the tip end of the plunger and the pump head watertight ring 82 and the gasket is provided in. .BACKGROUND
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