The invention discloses a bridge pile-bucket combined foundation and a construction method thereof, which relate to bridge construction technology. The bridge pile-bucket combined foundation comprises a bucket and bored piles, and is characterized in that: the wall of the bucket is provided with vertical spaced pile holes, a first partition is arranged on an inner bucket wall to divide the cavity of the bucket wall into an upper cavity and a lower cavity, a second partition is arranged in the upper cavity to divide the upper cavity into partitioned upper cavity units, and the center of the second partition is provided with a working hole, which runs through the first partition and communicates with the lower cavity. Since the bridge pile-bucket combined foundation combines the bucket foundation and the bored piles together, the vertical bearing capability of the bucket foundation is enhanced, and the post-construction settlement of the foundation is reduced. Because the bucket foundation serves as a bored pile construction platform, in the process of pile foundation construction, a cofferdam does not need to be built any more, pile casings do not need to be settled any more, and consequently, not only is the size of the pile foundation reduced, but also the construction cost is greatly reduced. The invention has low requirement on construction equipment, water injection in the partitioned cavities is adopted as a foundation-sinking and deflection-correcting measure in the process of construction, and the problem of difficult deflection correction in the sinking process of the bucket foundation is solved.