The invention discloses a multifunctional cement mixer, and can solve the problems of low mixing efficiency, poor mixing effect and big environmental noise in the prior art. The multifunctional cementmixer includes: a mixing box body equipped with a feed inlet at the top and a discharge port at the bottom, a support frame device, a first mixing device and a second mixing device that are located in the mixing box body and are distributed from top to bottom, a feeding device connected to the feed inlet, a discharge device connected to the discharge port, a support plate, a rubber buffer plate,a first platform buffer plate, a second platform buffer plate, sound absorption and noise reduction mechanisms, sound absorption and noise reduction shells, sound absorption cotton, and a first drivemotor and a second drive motor. The bottom of the mixing box body is an inclined plane, and the included angle between the inclined plane and the horizontal plane is 15degree-30degree, and the discharge port is located at the lowest end of the inclined plane. The multifunctional cement mixer provided by the invention has the advantages of simple structure, scientific and reasonable design, convenient use, high mixing efficiency and uniform mixing, can effectively protect the mixing box body and the drive motors, and avoids environmental noise pollution.