The invention provides a food cutting machine, comprising a base, a driving device, a threaded rod and a cutting device; the driving device comprises a motor, a transmission mechanism and a pushing mechanism; the transmission mechanism comprises a driving gear and a driven gear; the driving gear meshes with the driven gear; the motor is connected with the driving gear; the threaded rod passes through the driven gear; the driven gear is provided with a protrusion; the threaded rod is provided with a groove; the protrusion meshes with the groove. The food cutting mechanism is ingenious in structure and high in processing efficiency and has the advantages of simple structure, good driving effect, high stability, good balance, operational simplicity and the like.