The invention relates to a stator evaporate cooling coupled circulator of water-wheel generator, which comprises stator winding heater immerged with evaporate medium, the condenser system for exchanging heat with coolant, and stator collector ring heater immerged via evaporate medium, wherein one end of stator winding heater via first collecting tube, first reflux tube is connected to the bottom of condenser, while another end is through to the first main gas collecting tube, which via the first gas collecting tube is through to the upper part of condenser; one end of stator collector ring heater via second collecting tube, second reflux tube is through to the bottom of condenser, while another end is through to the second main gas collecting tube, which via the second gas collecting tubeis through to the upper part of condenser. The invention has simple structure and makes the axial and circumference temperature distributed uniformly on stator winding and collector ring.