The utility model relates to a fur paddle vat circulating-heating device, which comprises a steam jet pipe and a water-steam mixing tube. The utility model is characterized in that the main body of the steam jet pipe is a liquid absorbing hole segment, a diameter reducing segment and a drainage pipe segment, and the steam jet pipe passes through the water-steam mixing tube, and the water-steam mixing tube is communicated with a fur paddle vat through a liquid inlet pipe. Since the fur paddle vat circulating-heating device adopts the steam jet pipe and the water-steam mixing tube, and then, when hot steam is jetted from the steam jet pipe, low pressure is led to be formed in the water-steam mixing tube through the steam pressure jet flow function, thereby absorbing machining liquid in the fur paddle vat into the water-steam mixing tube, and then the machining liquid gets into the steam jet pipe to mix, heat and drain with steam, which is finally jetted in the paddle vat through the drainage pipe segment, and the heating to the machining liquid is achieved.