The invention relates to a stator assembling machine which is characterized by comprising a rotor clamping mechanism, a stator clamping mechanism, a rotor driving mechanism and a stator driving mechanism, wherein the rotor clamping mechanism comprises a driving part and a rotor clamping part (2); the stator clamping mechanism comprises a stator clamping part (3) and a stator driving mechanism; the stator driving mechanism comprises a connecting rod mechanism used for driving the stator clamping part (3); a rotor (5) and a stator (9) are respectively clamped by the rotor clamping part (2) and the stator clamping part (3); and the clamped stator (9) can be placed in the rotor under the action of the stator driving mechanism. The stator assembling machine can accurately position the stator in the rotor and can greatly improve the work efficiency.