A novelcompressor is called as harmonious balance type energy converter, comprising a compressor host and a balancing modulator. The two parts are respectively composed of moving cylinder blocks, fixed plunger pistons and sealing covers, which are put in the air tank. The moving cylinder blocks of the host and the balanced modulator are connected together, and are intercommunicated by ducts; the plunger piston and the air tank are also connected into an integration. The back-and-forth movement of the host cylinder block regulates balancer moving with it, and compresses air into the tank. When it is propelled toward, the sealing cover is inclosed with the cylinder block; when the sealing cover is taken back, the thrust force and the resistance force are cancelled each other to achieve balance, in order to solve the problem of the back pressure resistance force which is generated by the compressor in the persist boost. The utility model has the advantages of saving labor and saving energy for all kinds of supercharging equipment.