Compound synthesis device

The utility model relates to a compound synthesizer which comprises a body, rotating assemblies are arranged on the body and an inner shell, each rotating assembly comprises a fixed gear fixedly installed outside the inner shell, a rotating motor is fixedly connected to the left side of the body, a transmission rod is fixedly connected to an output shaft of the rotating motor, and a transmission shaft is fixedly connected to the transmission rod. The end, away from the rotating motor, of the transmission rod is fixedly connected with a rotating gear penetrating through the body and meshed with the fixed gear, a sliding groove is formed in the side wall of an inner cavity of the body, and pulleys slidably connected with the sliding groove are fixedly connected to the left side wall and the right side wall of the inner shell correspondingly. According to the compound synthesis device, by arranging the rotating assembly, when a user carries out polypropylene synthesis, a rotating motor is driven to drive a rotat