Abstract: Main composition of light coal tar is introduced. Working procedures for unloading, metering and settlement of light coal tar and general proceedings in switching combustion are explained, and results from environment impact monitoring for the light coal tar and combustion products are analyzed. Through practice of light coal tar substituting for fuel at pumping stations in Luning Oil Transportation Company, it is indicated that utilizing light coal tar as a substitution for crude oil or fuel oil for heaters and boilers in pumping station is a cost-effective approach to energy saving.