The utility model discloses a novel six-leg platform jacket. The novel six-leg platform jacket comprises six jacket legs, and a steel pile penetrates through the jacket legs; the jacket legs are vertically arranged, the upper ends of the six jacket legs are sequentially connected through supporting rods to form a regular hexagon I, and the lower ends of the six jacket legs are sequentially connected through supporting rods to form a regular hexagon II; the length of each side of the regular hexagon I is smaller than the length of each side of the regular hexagon II. According to the novel six-leg platform jacket, a second shaft of the jacket and a third shaft of the jacket can be connected or disconnected as required; the jacket is in split installation through a small floating crane when the second shaft of the jacket and the third shaft of the jacket are disconnected, and cost for installation at sea can be saved; compared with a convectional jacket, the environment load can be reduced by 10 percent, and the pile head force can also be reduced properly; a left platform block and a right platform block are both stably supported, and an extra module supporting frame is not needed. Each single block can be installed without a super large floating crane, and cost for installation at sea can be substantially saved.