The invention discloses a liquid storage tank driving heat dissipation through memory alloys and relates to a heat dissipation liquid storage tank. A tank body is provided with a partition and is divided into a liquid sucking chamber and a liquid return chamber. A liquid sucking pipe and a liquid return pipe are installed on the tank body. An air filter and a strainer are installed above and belowa liquid injection opening. A bottom plate of the tank body is inclined from the middle to the two sides. The bottom of the tank body is blocked by a liquid release bolt. Center holes are formed in the tank walls of the front and rear sides of the tank body correspondingly. Sealing bearings are installed at the center holes. A rotary shaft is rotationally installed between the two sealing bearings. A plurality of support frames are fixed to the rotary shaft and are provided with a plurality of joints at equal angles. Blades are divided into connection rods and poking pieces. The connection rods are long-thin-strip-shaped shape memory alloys and are fixed to the tail ends of the joints. The poking pieces are fixed to the outer ends of the connection rods. The blades and the support framesform a heat engine. Fans are fixed to the rotary shaft at intervals. Through the memory recovery effect of the shape memory alloys, heat energy is converted into mechanical energy to dissipate heat, and energy recovery and energy saving effects are achieved.