The invention discloses a novel bearing movement mechanism for a sliding plug door. The novel bearing movement mechanism is composed of a vehicle door connecting mechanism, a sliding mechanism and a balance sliding plug mechanism. Door sheets are connected with the vehicle door connecting mechanism, the vehicle door connecting mechanism moves through the sliding mechanism, and the sliding mechanism is fixed to the balance sliding plug mechanism. The bearing movement mechanism into which rainwater is prevented from splashing is novel and simple in structure and can keep the relatively large opening degree of an original sliding plug door, rainwater can be effectively prevented from splashing into the bearing movement mechanism, the occurrence of failures is reduced, and the service life of guide rails is prolonged.