The invention relates to a pile casting for a bridge pile foundation. The problem that waste is caused because the traditional pile casting is difficult to pull up is solved by increasing the thickness of the pile casting to a certain extent to form an annular area with a certain width at the bottom end of the pile casting and inflating and pressurizing the area (the bottom end of the pile casting) through a preset air duct so as to upwards hold up the pile casting by the force generated by air pressure. The invention adopts a technical scheme that: the pile casting for the bridge pile foundation consists of an inner wall, an outer wall, a connecting ring connecting the inner and outer walls and the air duct, wherein a grooved closed structure with an opening on the lower part is respectively formed at the lower ends of the inner and outer walls through the connecting ring; the air duct used for leading external air into a groove is positioned between the inner and outer walls; the depth of the outer wall buried into the ground is more than that of the inner wall buried into the ground; and a gas outlet pipe is also arranged between the inner and outer walls. Through the fluid mechanics principle, the pile casting can be easy to pull up; the waste caused when a longer pile casting cannot be pulled up is avoided; and the cost is saved.