The utility model relates to a fixed bed reactor that is used for catalysis ammoniation legal system ethanolamine, mainly solve among the prior art reactor structure complicated, remove that hot effect is poor, conversion rate and selectivity hang down the scheduling problem. The utility model discloses an adopt shell and tube fixed bed reactor, this reactor is a cylindrical vessel who has the shell and tube catalyst bed, the feed inlet is located the reactor top, the discharge gate is located the reactor bottom, be equipped with the pre -distributor in the feed inlet, the catalyst bed comprises the many reaction tubulations that are located between the upper and lower tube sheet of reactor casing, load the catalyst in the reaction tubulation, it is located between reactor casing internal reaction tubulation to remove the thermal medium, remove the thermal medium and adopt circulation hot water, with the mobile technical scheme of commodity circulation cisoid in the reaction tubulation, or a rare -earth element are loaded on frame copper, the industrial production who can be used to catalysis ammoniation legal system ethanolamine.