Abstract: A WZ 5 turboshaft engine has been modified with a rebuilt high temperature turbine as a ground power plant.The engine can make full use of its turbine inlet temperature through varying areas of both gas generator turbine and power turbine nozzles and reduce the rotor speed,thus a sufficient surge margin is provided and the output shaft power is enhanced.Therefore,the engine meets the requirements for long time operation when it serves as a power plant in varied ground industrial complex.The practice of its usage has shown that the modified WZ-5 is of considerable economic and social benefits.