Modified starch dry reactor

The utility model discloses a dry reactor for modified starch. Reaction cylinder, a bracket is fixedly mounted on the outer wall of the reaction cylinder; heating cavity grooves are formed in the leftside wall and the right side wall of the reaction cylinder, heating resistance wire plates are fixedly installed in the heating cavity grooves, the top of the reaction cylinder is fixedly covered with a top cover, a penetrating hole is vertically formed in the middle of the top cover, and two electric push rods symmetrical about the penetrating hole are fixedly installed on the top of the top cover in a vertically upward mode. The supporting table on the lower portion can be driven to ascend and descend through the two electric push rods, when the supporting table descends, a through openingis completely formed in the bottom of the reaction barrel, the discharging efficiency is improved, meanwhile, residues in the reaction barrel are avoided, and even if the residues appear, an operatorcan conveniently remove the