The invention provides a heat pipe heat storage heat exchanger capable of expanding area of an evaporation end. The heat pipe heat storage heat exchanger comprises a gravity heat pipe, the heat pipe comprises an evaporation end and a condensation end, wherein the evaporation end is arranged in a heat accumulator, the heat accumulator is arranged in a heat source, the condensation end is arranged in a container of a cold source, and the cross sectional area of the heat accumulator is larger than the cross sectional area of the container where the cold source is located. According to the heat pipe heat storage heat exchanger, the heat accumulator is arranged so as to store heat in the heat source, the cross sectional area of the heat accumulator is larger than the cross sectional area of thecontainer where the cold source is located, the heat exchange area between the heat accumulator and the heat source can be further increased, more heat can be stored, and the requirement for heatingis further met.