The invention provides a multifunctional electric furnace gun tail structure. The multifunctional electric furnace gun tail structure comprises a spraying nozzle pipe which is connected with a fuel gas pipe, the side portion of the fuel gas pipe is communicated with a powder pipe and a detection pipe, an inlet of the detection pipe is located at the upstream of an inlet of the powder pipe, a transparent lens used for isolating airflow is arranged in the detection pipe, and the spraying nozzle pipe is communicated to a sprayer of an electric furnace gun body. According to the multifunctional electric furnace gun tail structure, multifunctional integration of an electric furnace gun can be achieved, and the functions including electric furnace gun powder spraying, fuel gas spraying, bundlingoxygen blowing, molten steel temperature real-time detection, furnace gas analysis, automatic furnace condition monitoring or manual observation and the like are integrated.