The invention relates to the field of building construction, in particular to a steel trestle and a construction method thereof, steel trestle, comprises a plurality of steel pipe piles and a beam body arranged on the steel pipe piles, A bridge abutment for supporting the beam body is arranged on the riverbank or the island corresponding to the two ends of the beam body along the bridge direction,and a support profile for supporting the end of the beam body is arranged on the bridge abutment. When the design position of the steel pipe pile is hard stratum and the steel pipe is difficult to beinserted into the design depth, the steel pipe pile in hard stratum is adopted. The steel trestle provided by the invention is provided with support profiles on the bridge abutment, thereby increasing the stress area of the bridge abutment, thereby improving the reliability of the bridge abutment support, and can realize the adjustment of the support height by selecting profiles of suitable sizes, thereby realizing the adjustment of the height of the beam body at the bridge abutment; The steel trestle of the invention adopts the steel pipe pile in hard stratum, which makes the formed steel pipe pile stable and reliable, greatly simplifies the construction process and reduces the construction cost.