The present invention provides an economizer component, including: a housing; an economizer chamber and an inter-stage flow path chamber, formed inside the housing by using a separator; a condenser connecting port and an evaporator connecting port, disposed on the economizer chamber; a first connecting port and a second connecting port, connected in a multi-stage compressor unit and disposed on the inter-stage flow path chamber; and the economizer chamber being in fluid connection with the inter-stage flow path chamber inside the housing. The economizer component provided in the present invention can reduce complexity of pipe passages of a refrigeration system in which the economizer component is applied.