Reaction kettle with improved-structure stirring paddle

The utility model relates to a reaction kettle, and in particular relates to a reaction kettle with an improved-structure stirring paddle, and belongs to the field of chemical engineering equipment. The reaction kettle comprises a kettle body; the kettle body is divided into an upper part and a lower part which are connected through a fixing device; the kettle body is internally provided with a reaction cavity; the upper part of the reaction kettle of the upper half kettle body is provided with a spraying pipe with a spraying opening; the kettle wall of the upper half kettle body is provided with an installation opening; a blade of the stirring paddle is of a through-hole structure; the stirring paddle not only can stir materials fully, but also can reduce the stirring weight, lower the requirement on power of the reaction kettle, and save energy sources; the outer side of the kettle body of the reaction kettle is provided with a thermal insulation layer which forms a sandwiched layer together with the kettle