The utility model belongs to the technical field of high-pressure hydrogenation reaction discharging operation, and particularly relates to an anti-impact discharging system of a high-pressure hydrogenation reaction kettle. The device comprises a reaction kettle, and a manual switch valve, a pneumatic switch valve and a check valve are sequentially arranged on a discharge pipeline of the reactionkettle; and a restriction orifice is arranged between the pneumatic switch valve and the check valve. The utility model has a simple structure, normally open manual switch valve, use during maintenance, during discharging, the pneumatic switch valve is opened, the pressure in the kettle is 6.0 MPA, the feed liquid is discharged outwards through the pressure, the feed liquid is subjected to the flow limiting and pressure reducing effects of the flow limiting pore plate, the pore plate rear pressure is 0.4 MPA, the discharge pore plate rear pressure is low and stable, vibration is reduced, impact on a discharge pipeline and a discharge tank is reduced, and safe production is guaranteed.