The invention relates to an air source heat pump water heater high-density heat storage integrated machine. The air source heat pump water heater high-density heat storage integrated machine comprisesan outdoor fan (6) and further comprises an evaporator (1), a compressor (3), a condenser/heat reservoir integrated device (4) and a throttling device (5) which are sequentially connected through a refrigerant pipeline (2) and form a circulation loop, wherein the condenser/heat reservoir integrated device (4) has the double functions of a refrigerant condenser and a high-density heat reservoir. Compared with the prior art, the design that the condenser and the heat reservoir are integrated is adopted, the heat exchange temperature difference of stored/released heat of the air source heat pumpwater heater high-density heat storage integrated machine can be decreased by 5-15 DEG C compared with the traditional heat storage and exchange technology, the air source heat pump water heater high-density heat storage integrated machine has the remarkable advantages of being compact in structure, efficient in heat exchange, convenient to install, small in heat exchange temperature difference,and the like, if a compressor is driven by off-peak electricity to store heat for a phase change material, in this way, the operation cost is 1/3-1/6 of the cost of a traditional direct electric heating mode, and the air source heat pump water heater high-density heat storage integrated machine has good energy saving economical efficiency and can be widely applied to the field of domestic hot water.