Piston for unidirectional or bidirectional piston type swashplate compressor

The utility model provides a piston for unidirectional or bidirectional piston type swashplate compressor, which is characterized in that: the utility model includes a piston, an overburden layer of binder and molybdenum disulfide or graphite which is disposed on the outer circle of the piston, a tin alloy overburden layer arranged on the end of the piston and the spherical socket. The utility model covers the outer circle of the piston with the synthesis coating mainly made by binder and molybdenum disulfide or graphite, so the outer circle of the piston is provided with better lubrication and smaller contact friction when moving in the piston hole of the compressor cylinder, the utility model is provided with better economics.