Modular screw compressor

The utility model relates to a modular screw compressor, which comprises an oil-gas cooler, an integrated screw main machine and a motor, wherein the driving wheel of the motor is connected with that of the integrated screw main machine; the integrated screw main machine is arranged on an oil-gas separation box; the gas inlet end of the integrated screw main machine is connected with an air cleaner by a gas inlet control valve; the oil inlet of the integrated screw main machine is connected with the oil outlet of the oil-gas cooler by an oil cooler oil outlet pipe; the oil outlet of the oil-gas separation box is connected with the oil inlet of the oil cooler by an oil cooler oil inlet pipe; the rear end cover of the oil-gas separation box is provided with an oil-gas fine separator seat, on which an oil-gas fine separator is arranged; the inlet of the oil-gas fine separator is connected with the oil-gas mixture outlet of the oil-gas separation box; a minimum pressure valve is arranged below the oil-gas fine separator seat; and the gas outlet of the minimum pressure valve is connected with the gas inlet of the oil-gas cooler by an oil cooler gas inlet pipe. The modular screw compressor is compact in structure and favorable for reducing fault points.