The invention relates to a device used for integrated heat exchange of a diaphragm pump and an evaporator. A main body is an integrated block, the front and back surfaces of the integrated block are respectively matched with contours of the diaphragm pump and the evaporator, a diaphragm pump end liquid inlet, a diaphragm pump end liquid outlet and a diaphragm pump fixed port are formed in the front of the integrated block, an evaporator end liquid inlet, an evaporator end liquid outlet and an evaporator fixed port are formed in the back of the integrated block, an externally connected end liquid inlet and an externally connected end liquid outlet are formed in one side surface of the integrated block, an integrated block fixed port is formed in the other side surface of the integrated block, the diaphragm pump end liquid inlet and the evaporator end liquid outlet are intercommunicated in the integrated block, the evaporator end liquid inlet and the externally connected end liquid outlet are intercommunicated in the integrated block, and the diaphragm pump end liquid outlet and the externally connected end liquid inlet are intercommunicated in the integrated block. The integrated block can adopt a switch connection structure to integrate the diaphragm pump and the evaporator together under the condition that internal space of a refrigeration host is narrow, the space is utilized to the utmost extent, and the heat exchange efficiency is improved.