The HTR-10 helium circulating compressor unit is the core equipment of the 10MW high temperature gas cooled test reactor. The unit drives the helium gas through the core of the reactor core in the primary circuit of the high temperature gas cooled reactor, and when the reactor starts normally, runs and shuts down the reactor, etc. Through the primary circuit system, the heat produced by reactor core is passed through the steam generator, and the heat is taken away. After pressurized by the helium circulation compressor, the heat is returned to the reactor core to realize the energy exchange.