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This invention discloses a corrosion-resistant, high-efficiency PTFE heat exchanger, relating to the field of PTFE heat exchanger technology. It includes a heat exchange shell section, inside which a PTFE heat exchange device is installed for protection against chemical reactions. A water inlet control component and a drain control component are installed on the heat exchange shell section. Both the water inlet and drain control components are equipped with passage retainers. A pressurization auxiliary component is installed on the heat exchange shell section. The use of PTFE tubing in conjunction with an internally installed rubber tube improves the safety of PTFE tube heat exchange, preventing chemical reactions caused by leaks and reducing costs due to equipment corrosion. This addresses the problem of significant safety hazards and poor protection in current corrosion-resistant, high-efficiency PTFE heat exchangers when leaks occur.