The invention discloses a connector for reserving a steel shaft wall false tunnel and an application thereof. The connector is formed by splicing and assembling a plurality of assembly parts with thesame size and structure. The assembled connector is a box body in a cube shape, and connecting openings are formed in the outer surfaces of the box body and can be connected with a plurality of steelshaft walls in the different directions. The design is reasonable. The connector is formed in a splicing mode, and therefore labor intensity can be lowered and connector construction quality is improved. The assembly parts can be manufactured in a production line in a programmed mode, and the manufacturing cost can be lowered and overall construction efficiency of the reserving program can be improved. Material range is wide, design and manufacturing can be carried out as needed, and promotion prospect is great.