In order to study comparatively the relationship between the load and settlement of the hydrostatic closed ladder-type variable cross-section pipe-pile and the constant section pipe-pile, three variable cross-section pipe-piles and two constant section pipe-piles were implemented pile static-load tests in foundation pit. The results showed that when the piles’ body volume is the same, the variable cross-section pipe-piles had obvious advantages in increasing vertical ultimate bearing capacity and decreasing the pile settlement. Through the load - settlement curve regression analysis, found that the exponential function could be used to describe the relationship between the load and settlement, and according to the fitting function, found that the calculated values and the measured values are basically the same, and indicated that it was feasible to describe the relationship between load and settlement by exponential function.