The invention discloses a dental curet accommodating apparatus convenient in joint replacement. The dental curet accommodating apparatus comprises a main shell, a semi-closed plate, an accommodating box, an electric push rod, a first connecting cross bar, a second connecting cross bar, a connecting shaft rod, a third connecting cross bar, a support, a movable fixing block, a static fixing frame, adental curet joint, a spin slot, a fixing frame, a telescopic rod, a driving shell, a transposition motor, a nut, a dental curet key rod, a hexagon column, a spin stud, an electric push rod control button and a transposition motor control button. The dental curet accommodating apparatus is reasonable in design, a dental curet is split into the dental curret joint and the dental curet key rod, thedental curets different in model and type can be obtained by replacing the dental curet joint on the dental curet key rod, preparation of multiple dental curets is not needed, and cost of dental careis lowered; the dental curet joint is replaced by the aid of a dental curet key rod installation mechanism and a dental curet joint fixing mechanism, convenience and rapidness are achieved, and convenience is brought to medical staff of the dental department.