The invention discloses a special-shaped combined block and a method for constructing a wall body by adopting the same. The special-shaped combined block comprises a No. 0 block with a rectangle cross section and 6 blocks with L-shaped cross sections, wherein the 6 blocks are numbered from 1 to 6; the No. 0 block is a rectangular block with the length, width and the thickness of 360 mm, 240 mm and 60 mm; the No. 1 and the No. 2 blocks are L-shaped blocks with the length, width, thickness and the arm width of 230 mm, 240 mm, 60 mm and 60 mm; the No. 3 and the No. 4 blocks are L-shaped blocks with the length, width, thickness, narrow arm width and the wide arm width of 350 mm, 240 mm, 60 mm, 60 mm and 180 mm; and the No. 5 and the No. 6 blocks are L-shaped blocks with the length, width, thickness and the arm width of 240 mm, 300 mm, 60 mm and 60 mm. With the adoption of the special-shaped combined block and the method, the cold bridge problem of a ring beam and a constructional column in a self heat-preservation masonry structure is effectively solved, and the number of templates used in the casting of concrete at the ring beam and the constructional column is greatly reduced, and the construction is also facilitated.