Abstract: The current situation and existing problems of drinking water source of Nahe Reservoir was analyzed.The construction target of water source and stable water source protection were formulated. The countermeasures covered setting targets for the construction of stable water source protection standards, improving protection signs for water source protection zones, constructing isolation and protection facilities, collecting and treating rural domestic sewage and rural domestic waste and rural livestock and poultry breeding manure, and carrying out surface source pollution control. This will provide a scientific reference for the protection of drinking water sources for other reservoirs.