The utility model discloses an overhead power transmission line, including a support base, two low pressure poles are installed on supporting seat upper portion, two be equipped with the low pressure cross arm between the top of low pressure pole, low pressure cross arm both ends are equipped with low voltage insulator respectively, low voltage insulator connects the low-voltage line, two the top of low pressure pole makes progress respectively to extend and is equipped with high-pressure pole, two be equipped with high-pressure cross arm between the top of high pressure pole, high pressure cross arm both ends are equipped with high voltage insulator respectively, high voltage insulator connects the high-voltage line. The utility model discloses simple, the simple to operate that is under construction of overall structure design, the convenient and fast during removal, it is reliable and stable when fixing temporarily, can ensure stably power supply in time, maintain and demolish the convenience that the lightning protection effect is obvious, is suitable for very much frequent regional use of overhead line of changing the use.