The invention relates to a roller mixer which is characterized by comprising a mixer main body, a mixer spindle sleeve, a roller, a motor and a controller, wherein the mixer main body and the mixer spindle sleeve are connected together through the roller, the motor is connected with the roller, the controller is connected with the motor, the surface of the roller is provided with an adsorption interlayer, the controller comprises a controller main body and a control button, the control button is arranged on the controller main body, and a tray is arranged between the mixer main body and the mixer spindle sleeve. The invention has the following beneficial effect: the adsorption interlayer arranged on the surface of the spindle sleeve can exert a good mixing effect.