The utility model relates to a possesses organic rankine cycle power generation system who sends out electric machine cooling function, the system includes evaporimeter, vapour and liquid separator, expander, generator, condenser, reservoir and working medium pump, evaporimeter, vapour and liquid separator, expander, condenser, reservoir and working medium pump connect gradually through the pipeline, the generator with the expander is connected, the system is still including throttle valve member and temperature controller, throttle valve member and temperature controller electricity are connected, throttle valve member input and output respectively through the pipeline and an output and a power input end of working medium pump are connected, temperature controller sets up in the connection generator output terminal with on the pipeline of condenser input. The utility model discloses an embodiment can effectively be cooled off the generator under the condition that need not additionally set up generator cooling system to the latent heat of vaporization of organic working medium has been utilized to great degree, can reduce the cost input of system simultaneously to a certain extent.