A foaming brick cutting machine used for a production line of a non-steamed foaming brick comprises a cutting machine rack, an overturning mechanism, a lifting mechanism and a cutting mechanism. The overturning mechanism comprises an L-shaped overturning plate, an overturning motor, a supporting plate, a pushing plate and a pushing air cylinder; the L-shaped overturning plate is movably mounted onthe cutting machine rack through a rotating shaft and located on one side of a transferring track; and a shell of the overturning motor is fixedly mounted on the cutting machine rack, a power outputshaft drives the L-shaped overturning plate to be overturned through the rotating shaft, the supporting plate is movably mounted on one edge of the L-shaped overturning plate through a linear slidingrail, and a cylinder body of the pushing air cylinder is fixedly mounted on the other edge of the L-shaped overturning plate. According to the foaming brick cutting machine used for the production line of the non-steamed foaming brick, structure design is reasonable, cutting is conducted by utilizing an oblique cutting method of a steel wire rope, cooperated with the lifting mechanism, cutting canbe efficiently completed, and meanwhile, pollution to the environment is greatly reduced.