The invention discloses a method for lifting the base plane of a power transmission line tower by adopting a steel pipe connecting leg, and relates to the technical field of high-voltage power transmission lines. The method comprises the following steps of lifting an angle steel tower; connecting a steel pipe main member with an angle steel tower main member by using a flange; connecting the main members with a diagonal member by using a plug board; embedding steel pipe pins. According to the method, the problems of higher earth filling time consumption and strict construction quality requirements of an earth filling scheme can be effectively solved, the condition that a body work amount is increased by the great horizontal displacement of the ground when a pile foundation scheme is adopted is avoided, and the shortcomings of long concrete curing time and larger using amounts of reinforcements and concrete of a reinforced concrete frame structure scheme are overcome.