The invention discloses high-parameter ORC turbine power generation equipment applied to engine waste heat recovery, which is characterized in that a rotating shaft of a generator is connected with amain shaft of an expansion machine to convert the work of the expansion machine into electric energy for storage or utilization, the expansion machine comprises an air inlet pipeline, a nozzle group including a plurality of stationary blades, an impeller, a turbine rotor and a shell, the expansion machine adopts a supersonic axial flow impulse type design, the turbine rotor is fixed on the shell through a bearing, a flow channel formed between two adjacent stationary blades in the nozzle group is in a scaling type, a special molded line is formed at the throat, the impeller is fixed on the rotor and rotates to drive the turbine rotor to rotate, air enters the air inlet pipeline, the airflow flows through the scaling type flow channel for acceleration, reaches the sound speed at the throatand is continuously accelerated, the airflow impacts the impeller to rotate and then is exhausted through an exhaust cavity, the impeller rotates to drive the turbine rotor to rotate, and the turbinerotor drives a rotating shaft of the generator to coaxially rotate. The equipment is suitable for a high-parameter ORC ethanol turbine with a large pressure ratio and small flow rate, and the achievable highest expansion efficiency is obtained.