The bid section 7 in the Qinghai-Tibet DC power transmission project is located near the Tanggula Mountain，where ecological environment is bad. Many environmental protection measures were used in the construction process, such as fixing the construction range, limiting the transport line, the ground of the transport routes being covered with grass and coir mats to avoid direct contact with the vehicle which may cause damage to vegetation, stripping the ground turf before excavation construction and replanting it in time, taking insulation measures to prevent the frozen soil melting, and vegetation restoration using cultivation method for the vegetation of poor recovery effect under stripping and replanting. These methods can effectively protected the construction site environment and minimize the adverse effects on animals, which can provide references for the environmental protection and vegetation restoration of power transmission project in high-altitude alpine regions.