本文通过对高原低温条件下工程机械起动过程的分析，分析不同的低温起动措施，并通过在工程机械上的应用，选定了适合青藏铁路寒季施工中工程机械的低温起动的措施。

The different measures for starting water-cooled engine of construction machine under low temperature arc analyzed based on analysis of its starting procedure in plateau. The suitable measures for starting water cooled engine of construction machine under low temperature, during the construction of Qinghai-Tibet Railway in cold weather arc defined through taking different measures for construction machine.