The invention discloses a contraction type heat exchanger, which comprises a body, wherein the body is provided with a heat exchange pipe assembly and is provided with an air inlet pipe assembly, a current collecting pipe assembly and a main liquid outlet pipe, the air inlet pipe assembly comprises a plurality of air inlet pipes and a multi-way pipe, one end of each air inlet pipe is connected with the corresponding heat exchange pipe assembly, in addition, a plurality of branches are formed, the other end of each air inlet pipe is collected at the multi-way pipe, the current collecting pipe assembly comprises a liquid outlet branch pipe, a multi-way pipe and a current collecting pipe in arrangement corresponding to each branch, the liquid outlet branch pipe comprises a first liquid outlet branch pipe and a second liquid outlet branch pipe, the first liquid outlet branch pipe realizes the current collection to the current collecting pipe through the multi-way pipe, the second liquid outlet branch pipe is used for liquid outlet, and the main liquid outlet pipe is connected with the current collection pipe through the heat exchange pipe assembly. The contraction type heat exchanger has the advantages that a heat exchanger flow path can be enabled to be anastomotic with the volume change of condensing agents, the heat exchange area of a condenser is sufficiently utilized, the use work condition range of an air conditioner is expanded, the refrigeration and heating effects of the air conditioner are improved, and the comfort degree of the air conditioner is improved, so the use efficiency is maximized.