The invention discloses a sectional water feeding type solar water heater. A water storage tank (1) is connected with two water outlets, one water outlet is positioned in the top end of the water storage tank and connected with a water return pipe (4) through a pipeline, and a water outlet valve SV1 is arranged on the pipeline of the water outlet; the other water outlet is positioned in the middleof the water storage tank and connected with the water return pipe through a pipeline, and a water outlet valve SV2 is arranged on the pipeline of the water outlet; water of the water return pipe flows to a water bucket (2), and the top end of the water bucket is connected with a movable arm (5) used for controlling a travel switch SQ to be switched on and switched off; and the solar water heaterfurther comprises a thermistor Rt1, a photoresistor Rs1 and a peripheral circuit, wherein the thermistor Rt1 is mounted in the water storage tank and used for sensing the water temperature, the photoresistor Rs1 is used for sensing the illumination intensity, and the peripheral circuit is connected with the thermistor Rt1, the photoresistor Rs1, the water outlet valve SV1, the water outlet valveSV2, a water inlet valve SV3 and the travel switch SQ. According to the solar water heater, the water feeding level can be automatically selected according to the illumination intensity of sunlight and the water temperature condition.