Combined bearing dismounting device

The utility model discloses a combined bearing dismounting device which is characterized in that a bearing is arranged on a shaft piece, and the dismounting device comprises a base, a guide seat and a connecting piece, the base is connected with the guide seat through a connecting piece; a guide hole is formed in the guide seat; a first supporting part is arranged at the bottom of the base, and the lower end of the first supporting part is used for making contact with a shaft or a part on the shaft. A second supporting part is arranged at the top of the guide seat; the upper end of the second supporting part is in contact with the bearing; the connecting piece is a driving piece and is used for shortening the distance between the base and the guide seat; or, the first supporting part is a driving part and is used for pushing the shaft part downwards during extension; or the second supporting part is a driving part and is used for pushing the bearing upwards during extension. When the bearing dismounting devic