Research conclusions：Schemes of Jiufengshan mountain are complex，which Are affected by many factors including passenger and freight transport capacity，the length of super mountain tunnel，the tunnel position，environmental regulations，engineering geological conditions，construction investment and So on．We acquires even schemes of three series through the study of large area of the crossing-mountain and the following conclusions through comparison of the engineering difficulty，the engineering geological conditions，engineering investment and the driving action for local economy development are：(1)First construction of double line can meet demand of passenger and freight transport in long tunnel crossing interval，and investment is low in the forward and operational risk is small．(2)Second length of crossing-mountain tunnel of east station scheme of pingnan baiyu is longest，but its passenger and freight transport conditions are relatively good，auxiliary projects are low，which has the practical significance to promote the local economic development in pingnan．