Disclosed in the invention is a novel gear generating experiment machine comprising a rack (1), an involute photosensitive stamp (2), a platform (3), a motor (4), a white paper base plate mechanism, and a position-changing mechanism. The platform (3), the motor (4), the white paper base plate mechanism, and the position-changing mechanism are arranged on the rack (1). The white paper base plate mechanism is arranged between the platform (3) and the position-changing mechanism. The machine has the following beneficial effects: the motion is stable; the design is reasonable; students can understand the principle of gear wheel processing by a generating cutting method easily and deeply; and the generating processing principle of the position-changing gear wheel can be implemented.