The invention discloses a device for reducing engine oil consumption and particle emission. The device comprises a crankcase, a gas flow regulator and a control unit; the crankcase communicates with abreather, a pressure sensor is arranged in the crankcase, and the pressure sensor is used for measuring pressure in the crankcase in real time; the gas flow regulator is arranged in a channel of thebreather, and the gas flow regulator is used for actively increasing or reducing gas in the crankcase; and the control unit is electrically connected with the pressure sensor, the real-time pressure in the crankcase is fed back to the control unit through the pressure sensor, the control unit is electrically connected with the gas flow regulator, the control unit controls the gas flow regulator towork according to the rotating speed of an engine, so that the pressure in the crankcase is adjusted to be in a calibration pressure, and the calibration pressure is determined according to the pressure in the crankcase corresponding to minimum engine oil consumption and the minimum particle emission amount of the engine at the same rotating speed. The device has the advantages that the engine oil consumption and the particle emission can be reduced.