The invention relates to the field of indoor planting and in particular relates to a water tillage machine. The water tillage machine comprises a water tillage machine body, a water tank and a plant vector, and further comprises a spray reflux system and a temperature controller, wherein the water tank is arranged at the bottom of the water tillage machine body; the plant vector is communicated with the water tank by virtue of the spray reflux system so as to form a circulation loop; and the temperature controller is arranged on the water tillage machine body and is used for respectively regulating the temperatures of the water tank and the water tillage machine body. According to the water tillage machine disclosed by the invention, the water temperature and the cultivation environment temperature can be well controlled by the temperature controller, so that plants grow in a suitable environment, the growth speed of the plants is accelerated, and diseases are reduced. Due to the arrangement of the spray reflux system, liquid can be circularly watered on the plants, and the effect of saving water resources is achieved. By virtue of the environmental temperature regulation of the temperature controller and sprayed liquid circulation, the machine can be suitable for crop growth, and the survival rate is improved.