Modified asphalt tubular mixer

The invention provides a modified asphalt tubular mixer, and relates to the technical field of modified asphalt. The tubular mixer comprises a stirring tank, a mixing device is arranged in the stirring tank and comprises a driving motor, the inner top of the stirring tank is rotationally connected with a limiting disc, the output end of the driving motor is in transmission connection with a shaft sleeve, the part, located in the limiting disc, of the shaft sleeve is in key connection with a driving gear, and one end of the shaft sleeve is fixedly connected with a shaftless spiral blade. Stirring shafts are uniformly arranged on the peripheral side of the driving gear and are in transmission connection with the driving gear, so that mixed materials can form reciprocating circulation from bottom to top and from inside to outside in the stirring tank, the mixing capacity in the stirring tank is enhanced, and the driving gear on the shaft sleeve is matched to synchronously drive the stirring shafts to rotate; and