Five-star-shaped-pile is a new type of cross section special shaped pile, which is formed by cutting five circular arcs in a circle pile. Five-star-shaped-pile is divided into two categories according to the nature of its cross section, the circumference of the maximum of five star shaped piles F₁ and the perimeter area ratio of the maximum of the five-star pile F₂. The experimental research on the comparison of four single piles in dry sand by sand pouring method is carried out to explore the horizontal bearing capacity of five-star-shaped piles. Similarity ratio is 1:8. These four single piles are:Maximum ratio of perimeter and area of the five star shaped pile F₁,the maximum of the circumference of the five star shaped pile F₂,round pile C₁ with the same section of F₂, round pile C₂ with the same cross-sectional area of F₂. The test results show that:1) the horizontal bearing capacity of F₂, C₁ and F₁ are near, but the section area of F₂ is the minimum, and it is only 0.44 times of C₁; 2) the horizontal bearing capacity of F₂ is 1.63 times of C₂, so it is concluded that the reasonable section form can improve the horizontal bearing capacity; 3) the moment distribution of four single piles is largely consistent, and the moment reach the maximum at 0.4 m; but the section of five-star-shaped pile is small, and the bending stiffness is not enough and it is easy to break; so the whole horizontal bearing capacity is less than that of C₁ but better than that of C₂.