Abstract: Steel structure is one of the important parts of construction engineering. The construction quality of steel structure is closely related to the strength of the entire building. The connections involved in the steel structure are relatively complex. It is necessary to understand the key technical points of the construction of the steel structure in the development. Only by applying the steel structure construction technology reasonably and strengthening the construction quality control can the construction of the steel structure proceed smoothly and ensure the overall construction quality of the steel structure of the building.