The invention discloses a soldering flux bracket for pile pipe submerged-arc soldering, and belongs to the technical field of soldering. The soldering flux bracket for pile pipe submerged-arc soldering comprises a first arc ring, a lock catch, a second arc ring, a first hinged piece, a second hinged piece and a third arc ring, wherein the first arc ring is in contact with a pile pipe, the lock catch is connected with the first arc ring, the second arc ring is connected with the first arc ring through the lock catch, the first arc ring is in contact with the pile pipe, the first hinged piece is connected with the first arc ring, the second hinged piece is connected with the second arc ring, one end of the third arc ring is connected with the first arc ring through the first hinged piece, the other end of the third arc ring is connected with the second arc ring through the second hinged piece, and an annular structure is defined by the first arc ring, the second arc ring and the third arc ring and clamped on the pile pipe. By means of the soldering flux bracket for pile pipe submerged-arc soldering, the submerged-arc soldering technology is smoothly applied to soldering operation of the pile pipe.