Water-cooled direct-drive electric roller

The embodiment of the utility model provides a water-cooled direct-drive electric roller. The water-cooled direct-drive electric roller comprises a stator, a rotor, a rotating sleeve, a connecting shaft, a partition plate and a plurality of flow guide plates, the rotor is sleeved with the rotating sleeve, and the rotating sleeve and the rotor rotate synchronously. The connecting shaft is sleeved with a cooling sleeve, the two ends of the cooling sleeve are connected with the connecting shaft in a sealed mode through sealing plates respectively so that a sealed cooling cavity can be formed outside the connecting shaft, and the connecting shaft is provided with a water inlet and a water outlet which communicate with the cooling cavity. And the stator is fixedly sleeved outside the cooling sleeve. Wherein the partition plate and the plurality of guide plates are arranged in the cooling cavity, the plurality of guide plates divide the cooling cavity into a plurality of communicating cavities which are sequentiall