The invention provides a square hollow step reducing slide-resistant pile structure and a construction method. The slide-resistant pile structure is composed of five sections from top to bottom. The slide-resistant pile structure comprises a first pile body section (1), a second pile body section (2), a third pile body section (3), a fourth pile body section (4) and a fifth pile body section (5).The edge of the third pile body section is the longest, the cross section area is the largest, the edge to the pile top and the edge to the pile bottom are sequentially reduced gradually, a reducing pile body is formed, and the adjacent sections are connected through a variable cross section. The second pile body section (2), the third pile body section (3) and the fourth pile body section (4) arein pile body hollow section structures (6). The slide-resistant pile structure has high bending resisting and shearing resisting abilities, the cross section area of the middle sections of the pile bodies is increased obviously, and the higher slide-resistant ability is shown. The slide-resistant pile structure saves building materials, the cost is reduced, under the same pressure resisting, bending resisting and shearing resisting numerical values, the building materials like concrete can be saved by 40-70%, and the economic benefits are obvious.