The utility model provides a hydrogenation reaction kettle, including the cauldron body and vertical (mixing) shaft, still include the circulating pump, efflux nozzle and first pipeline, it is external and through second pipeline and cauldron body intercommunication that the cauldron is located to the circulating pump, it is internal that efflux nozzle locates the cauldron, the one end that vertical (mixing) shaft stretched into the cauldron body is connected with a plurality of slope connecting rods, the slope connecting rod becomes a constant angle degree with vertical (mixing) shaft, the bottom and motor fixed connection of slope connecting rod, the output shaft slope (mixing) shaft of motor, slope (mixing) shaft bottom is equipped with the stirring leaf, still be equipped with the outlet duct on the slope connecting rod, for the cavity body in vertical (mixing) shaft and the slope connecting rod, the cavity body of vertical (mixing) shaft and the cavity body intercommunication of slope connecting rod, the cavity body of slope connecting rod communicates with the outlet duct, it is equipped with the communicating through -hole of a plurality of and vertical (mixing) shaft cavity on the liquid level to lie in on the vertical (mixing) shaft. Through set up liquid follow annular spraying flow with gaseous inhaling certainly, add the slope (mixing) shaft, reinforce three -phase contact, improve reaction rate.