The invention provides an improved multilayer turbulence composite frame stirrer for chemical reaction vessel environmental protection machines and devices, especially for the mixing of medium and high viscosity liquids, heat transfer reaction and other processes, characterized in that: a stirring shaft is arranged in a reaction vessel body, the stirring shaft is connected with a reduction motor, the stirring shaft is provided with a stirring frame, a plurality of sets of crosspiece blades with different angles are arranged in the stirring frame, and a set of baffling baffle plates are arranged along with the wall of the stirrer. According to the invention, the stirrer can carry out uniform stirring as same as a helix ribbon type agitator, and has the advantage of a frame stirrer that small torque of rotating, and the service life of the motor reducer is prolonged.