The invention discloses a polypropylene polyreactor. The polypropylene polyreactor comprises a polyreactor body and a stirring device; the polyreactor body is composed of a first part, a second part and a third part from top to bottom, wherein the first part and the third part are each in a hemispheroid shape, the second part is in a cylinder shape, and a first opening is formed in the inner side wall of the upper portion of the second part in the peripheral direction; the stirring device comprises a rotating shaft, multiple stirring blades, at least one cross rod, two baffles and multiple brush rods; one end of each cross rod is fixedly connected with the rotating shaft, and the other end of each cross rod penetrates through the first opening; one baffle is arranged in a hollow part between the inner side wall and the outer side wall of the second part, and the other baffle is arranged in the second part; the brush rods are arranged in the hollow part between the inner side wall and the outer side wall of the second part. According to the polypropylene polyreactor, in the polyreaction process, scale on the inner walls and outer walls of the second part and the third part is scraped away continuously, the polyreactor can keep a certain heat transfer coefficient, and temperature control requirements are met.