Odor pump is a specially designed diaphragm plunger metering pump. Natural gas stinking pump is an important device for the detection of natural gas safety status. In order to ensure the safe distribution and safe use of natural gas, the addition of odorant is very important. Through the implementation of odor-adding measures, it is technically further ensured that users and maintenance managers of natural gas can find out in a timely manner by smell, handle the spill in time and eliminate the spill accident in its infancy.