The invention discloses a reservation device and method for slot raise. The device comprises a plurality of reservation assemblies connected end to end, wherein each reservation assembly comprises a reservation main body with gyroscope-shaped appearance, a cone-shaped bulge is formed at the top of each reservation main body, and a cone-shaped groove is formed in the bottom of eachreservation mainbody; outer stirrups matched with outer edge lines of the reservation main bodies are arranged on the outer surfaces of the reservation main bodies, inner connecting ribs are arranged inside the reservation main bodies, and two ends of the inner connecting ribs are connected with the outer stirrups at the cone-shaped bulges and the cone-shaped grooves of the reservation main bodies respectively; hoisting rings are arranged on the outer stirrups at the cone-shaped bulges of the reservation main bodies; connecting rings are arranged at upper parts and lower parts of the outer stirrups on side surfaces of the reservation main bodies respectively, and the connecting rings of the two adjacent reservation main bodies are connected through an S-shaped hook. The device replaces the traditional hole-shaped slot raise, the process flow is simplified, the construction cost and the labor intensity of operators can be reduced, construction difficulty is small, construction efficiency is high, and higher safety is achieved.