Abstract: In allusion to the problem of unconstant crude oil supply received from Erlian Oilfield, and aiming at simplifying the running mode and lowering transporting cost of Alshan-Saihantara Oil Pipeline, data analysis on pipeline transportation process (flowsheet) and specifications of transportation equipment is made, and theoretical calculation on the property of crude oil and running parameters is conducted meanwhile. Results show that different combination of running modes can realize the above-mentioned object.