The invention discloses a pressure-boosting absorptive-type auto-cascade absorption refrigeration circulating system, which comprises a generator, a rectifying component, a first heat exchanger, a solution heat exchanger, a condensation injector and an evaporating unit. The condensation injector is arranged between the solution heat exchanger and an absorber. An inlet of the condensation injectoris connected with a dilute solution outlet of the solution heat exchanger. An outlet of the condensation injector is connected with an inlet of the absorber. An injection guiding inlet of the condensation injector is connected with a reflux opening of the evaporating unit. The pressure-boosting absorptive-type auto-cascade absorption refrigeration circulating system reclaims the throttling loss of the solution. Therefore, the working pressure of the absorber is increased and the refrigeration coefficient of the system is improved. The refrigeration temperature which is lower than that of the prior auto-cascade absorption refrigeration circulating system can be obtained. The system also has advantages of low refrigeration temperature, stable operation and high efficiency, is suitable for places having a rich low-temperature heat source and needing low-temperature deep refrigeration, and has wide application prospect.