Decision-making on material transportation modes for traditional mountainous transmission projects often lacks a quantitative basis. This paper proposes a comprehensive evaluation system covering economy

safety based on the LEC method

environmental impact

and construction efficiency. It discusses and compares three transportation modes

namely manual and animal-powered transportation

cableway transportation

and drone transportation

and verifies the system using a photovoltaic power transmission line project in northwestern Zhejiang Province. The results show that drone transportation has low risk

high efficiency

and little ecological damage

but high direct costs. Cableway transportation has relatively high efficiency and moderate costs

but high risk values and considerable ecological damage. Manual and animal-powered transportation has relatively low risk and low costs

but low efficiency and high ecological sensitivity.