The invention discloses a cutting performance test apparatus used for the gas-pressurized cutters of the tunnel construction field, comprising a vertical column, a cross beam, a support plate, a guiding cylinder, a guiding cylinder cover, a cutter frame, a dynamic sealing, a cutter, a hydraulic cylinder, a soil bin, a soil-bin sensor, a soil-bin cover, a pipe joint, a static sealing, a slewing bearing, a slewing seat, a small gear, a motor, a slewing seat and a groundwork seat. The connection style is as follows: the vertical column is fixed on the groundwork and the cross beam is arranged on the upper end of the column; the guiding cylinder is connected with the cross beam through the support plate; the lower end of the guiding cylinder is extended into the soil bin; the bottom of the hydraulic cylinder is connected with the guiding cylinder cover; the lower end of the column is connected with the cutter frame; the sealing is arranged respectively between the soil-bin cover and the soil bin and the guiding cylinder; a gas pressurizing system brings pressure to the soil bin through the pipe joint on the bin cover; the outer ring of the slewing bearing is connected with the soil bin and the inner ring is connected with the slewing seat and the slewing bearing is driven by the motor arranged on the groundwork. The invention can realize the test for the cutting performance of cutters under different geological conditions so as to provide the experimental basis for studying the cutting mechanism of cutters and optimizing cutters.