The invention discloses a variable frequency air source heat pump refrigeration and heating hot water triple generation unit. The unit comprises a variable frequency compressor, a hot water heat exchanger, a cold-warm heat exchanger and a fin heat exchanger; one end of the variable frequency compressor is in pipe connection with the hot water heat exchanger; an exhaust temperature sensor is mounted between the hot water heat exchanger and the variable frequency compressor; and one end of the hot water heat exchanger is connected with a hot water tank through two pipes, and the other end is inpipe connection with a four-way valve. The unit is a system integrating refrigeration, heating and hot water triple generation as a whole, and prevents mixing of hot water by adopting variable frequency control and living hot water multi-point temperature control. Meanwhile, the system can recover waste heat to heat the hot water during refrigerating in summer to improve the refrigerating energy efficiency and to obtain free hot water, and is used for warming and heating of the hot water through operation of a heat pump mode in winter to achieve the energy-conservation recycling. The unit is simple in operation and quick and convenient to use, can be suitable for different regions, and is small in limitation and wide in application range.