Cable-borne crane is a special equipment for the erection of the main beam of large suspension bridge, and the transverse pole beam is the main component of the general cable-borne crane. In this paper, a comparative study is carried out on the two schemes of transverse flat beam design for Maanshan Yangtze River Bridge, that is, the comparison of box section beam and truss beam. Under the same working conditions, ANSYS finite element analysis software is used to make each scheme meet the requirements of strength, stiffness and stability, so as to analyze the advantages and disadvantages of the two schemes.