The invention discloses a multi-chamber solar water tank which comprises a case body (10), an inner chamber (9), a cold water inlet (4) and a hot water outlet (5). A heat-storage water chamber (1) and a heated water chamber (2) are arranged inside the inner chamber (9). A temperature-sensitive valve (3) is arranged between the heat-storage water chamber and the heated water chamber. The cold water inlet (4) and a temperature-controlled water outlet (6) are arranged inside the heated water chamber. The hot water outlet (5) and a temperature-controlled water inlet (7) are arranged inside the heat-storage water chamber. The heat-storage water chamber and the heated water chamber are formed by dividing the inner chamber by a metal partition (8). The water tank employs temperature-controlled drainage, multi-chamber heating and heat storage techniques, provides more hot water of high temperature, and increases the utilization rate of solar energy.