The invention discloses an improved multi-colour rubber manufacturing process. The improved multi-colour rubber manufacturing process comprises a pedestal, wherein a mixing and stirring cavity is arranged in the top end surface of the pedestal; a first conduction cavity is arranged in the pedestal at the left side of the mixing and stirring cavity; a rotary main shaft is mounted between the conduction cavity and the mixing and stirring cavity in a clearance fit mode; a plurality of groups of stirring paddles are fixedly arranged at the periphery of the rotary main shaft; the right side wall ofthe mixing and stirring cavity and the rotary main shaft are oppositely equipped with an insertion slot; the rotary main shaft extends into the insertion slot; the rotary main shaft extends into thefirst conduction cavity, and the periphery of the rotary main shaft is equipped with a pushing-extruding plate in a rotation fit mode; a guide slide plate is fixedly arranged on the top end surface ofthe pushing-extruding plate; the guide slide plate is mounted in the slide rail in a sliding fit mode; the slide rail is fixedly mounted on the top wall of the first conduction cavity; the tail end of the left side of the rotation main shaft is fixedly equipped with a first spline shaft; and the first spline shaft is connected with a first spline shell sleeve in a spline fit mode.