Guide ball fixing device

The utility model provides a guide ball fixing device, and belongs to the technical field of obstetric auxiliary instruments. The device comprises a bottom plate, a music guide ball fixing frame and abackrest, the music guide ball fixing frame is detachably mounted on the bottom plate through a first lifting structure; the backrest is provided with a sliding rod, a sliding rail is arranged in thebottom plate, and the backrest is detachably mounted on the bottom plate through sliding connection between the sliding rod and the sliding rail; armrests are detachably mounted on the backrest; a guardrail is detachably mounted on the backrest; a supporting rod is installed on the bottom plate and can rotate around a supporting rod rotating shaft, a groove is formed in the guardrail, and the guardrail is connected with the groove in a matched mode through the end of the supporting rod. Through the arrangement of the lifting structure, the music guide ball fixing frame and the handrail can belifted, and the lifting st