The utility model provides a natural gas odorization frequency signal generator. The natural gas odorization frequency signal generator comprises a logic circuit and an output circuit, wherein the output circuit is connected to an external dosing pump and used for controlling the external dosing pump to start and stop; the logic circuit is connected to the output circuit and used for controlling the connection and disconnection of the output circuit according to the actual requirements so as to control start and stop of the external dosing pump to adjust the dosing quantity and the dosing frequency. The natural gas odorization frequency signal generator is convenient to maintain, does not delay natural gas odorization, ensures the production and guarantees the personnel and property safety of residents.