DX pile is a new type of variable cross-section pile developed from last decades. This pile has been applied in many foundations of buildings for its great advantage of high bearing capacity and low settlement. Nowadays some foundations of bridges of highway road have adopted DX pile. A case of DX pile in Beijing was analyzed in this paper. Two DX piles and one straight pile were tested by static loading method. The vertical bearing capacity and Q-s curves were obtained. The settlements of different piles were also compared. The axial force along the shaft of DX pile was listed and the effects of bearing capacity of bells were analyzed.