The utility model discloses a double-wall hollow open caisson foundation. The device is characterized in that a double-wall hollow shaft with an annular cavity is formed by a shaft inner wall and a shaft outer wall, so that mud suction equipment can be put down through the annular cavity, a mud suction head of the mud suction equipment reaches a bottom foot of the shaft, the bottom foot of the shaft is a blade foot, and the blade foot is arranged on the inner side wall of the bottom foot of the shaft in a whole ring mode; in the sinking process of the shaft, the open caisson accurately sinks in the vertical direction due to the fact that pressure of inner soil, outer soil and side soil is kept balanced through mud suction equipment; under the influence of cavities below the blade feet, soil in the open caisson continuously collapses and vertically sinks under the action of gravity, vertical downward negative friction force is formed on the wall of the open caisson, vertical force during sinking of the open caisson is increased, the process is simple, construction is convenient and fast, rapid and accurate sinking is achieved, the open caisson sinking construction efficiency is improved, and the open caisson sinking device is suitable for land and water open caisson construction.