Steel wire rope bearing sidewall belt conveyor can cross complex terrain, complete long distance, high efficiency material conveying, both energy saving and environmental protection characteristics. In order to better apply this type of conveyor to engineering practice, the paper mainly uses catenary theory to study the uniform contact force of steel wire rope and conveyor belt in the coupling state. It is found that the calculation error of the contact force of catenary theory is 5.8%, and the sag error of theoretical calculation and simulation calculation is 0.0383m. At the same time, the Workbench platform was used to compare the sag and the deformation of the conveyor line to verify the feasibility of the concentrated force instead of the load imposed by the model, and to study the influence of material load, conveyor belt tension, steel wire rope tension, distance between fixed frames, distance between rollers and other factors on the concentrated force and sag of the conveyor belt supported by the steel wire rope, so as to provide reference for the subsequent research on the conveyor. Steel wire rope bearing sidewall belt conveyor is different from other basic conveying machinery with relatively simple structure and single function. It is a modern conveying equipment that conforms to the development trend of modern conveyor and develops in the direction of intelligent, large volume, long distance, multi-function, energy saving and environmental protection. This type of conveyor combines ropeway overhead technology with conveying technology, innovatively develops continuous conveying technology in the overhead ropeway, effectively solves the problem of conveying materials across the complex terrain of mountains and rivers, and is widely concerned by the modern conveying industry. The catenary method combined with finite element simulation was used to simulate the sag of conveyor belt between rollers and analyze the influencing factors of the throwing process. Zhang Pengfei calculated a series of main parameters of the conveyor, systematically studied the influence of the conveyor on the tower, and specifically analyzed the influence of the turning device on the stress of the conveyor belt: In the research, Zhao Jianfegu analyzed the bearing load of the conveyor and the material trajectory at the convex arc of the tower. The steel wire rope and conveyor belt of this type of conveyor are the main bearing structures. Due to the special conveying mode and supporting mode of this conveyor, the contact force is an important factor affecting the conveying resistance. Too small contact force will cause the conveyor belt to bear larger tension, and too large contact force will cause the steel wire rope to bear larger tension. At the same time, the sidewall belt conveyor has great bending and leads to great conveying resistance, and the contact force is an important factor affecting this type of conveyor. Steel wire rope and conveyor belt are coupled through rollers. Material load, conveyor belt tension, steel wire rope tension, distance between fixed frames, distance between rollers and other factors will affect the concentrated force and sag of rollers. By controlling single factor variables, the influence of different factors on the results is studied, and the analysis of roller concentration force is conducive to the adjustment of the overall tension of the conveyor and the evaluation of the life of the conveying parts, so as to improve the conveying efficiency of the whole machine.