Abstract:The design of municipal roads in low-mountain and hilly areas is different from that in plain areas. There are the problems in the high proportion of bridges and tunnels, and the terrain and cost limits of horizontal and vertical alignment. At the same time, it is necessary to minimize the ecological impact on the natural environment. Combined with the design scheme for the roads in the section of Longquan Mountain in the east-west urban axis, the control essentials in the design of municipal road alignment in the low-mountain and hilly area are discussed. And combined with BIM application in the early scheme design, the road alignment is visually displayed so as to realize the reasonable control of project function and cost.