Based on the aerial crossing pipeline structure was widely used in the construction of longdistance pipeline, due to the particularity of its structure, crossing structure extremely vulnerable to soil collapse and other geological disasters. The stress field variation law of the horizontal pipeline section of the crossing structure was studied by establishing the finite element model of the interaction between the buried pipeline and the soil. A detailed analysis of the stress changes in the pipeline was obtained when crossing pipeline structure used different horizontal pipeline section. The maximum stress value along with the variation of the settlement range of the horizontal pipeline was studied when the length of the horizontal pipe was 20 meters. The research showed that the range of horizontal section of crossing pipeline structure and soil sedimentation had greater impact on the stress field in the pipeline crossing the structure. 

Pipeline crossing structure was very easy to be affected by the settlement of soil along the river, and effective preventive measures should be adopted to effectively prevent the damage to the crossing structure. The finite element model of pipeline crossing structure and soil interaction was established, and the stress change of pipeline span structure with the fixed bracket was established. It was found that the fixed bracket could effectively reduce the stress value of the pipeline when the span structure was affected by the settlement of soil mass, and the installation position of the fixing bracket was more prominent to reduce the stress value of the pipeline span structure. The results could provide a theoretical basis for the safety construction of pipeline crossing structure.