The utility model relates to a technique is reformed transform to the 500kV circuit, the utility model discloses a heat -resisting molded lines in 35050 cross -sections for increase -volume of 500kV circuit is reformed transform, it is the tower pole for being used for JNRLH60XLB14 aluminium package steel core shaping heat resistant aluminum alloy stranded conductor to connect 500kV power transmission line specifically, wherein the heat resistant aluminum alloy stranded conductor includes the heart yearn 1 by many aluminium package steel core conductor stranding one -tenth, enveloped core wire 1's the inner conductor layer 2 and the outer conductor layer 3 on the interior aluminum conductor layer 2 of parcel, inner conductor layer 2 forms by the many aluminium conductor stranding that adopt heat resistant aluminum alloy to make with outer conductor layer 3, the cross sectional shape of aluminum conductor is fan -shaped, the cross sectional shape on inner conductor layer 2 and outer conductor layer 3 is the ring, and the cross sectional area's on outer conductor layer 3 and inner conductor layer 2 ratio is 4: 3. Through foretell heat resistant aluminum alloy stranded conductor, the aluminium conductors (cable) steel -reinforced 6 LGJ of the 500kV circuit that the replacement had now 400 50. The utility model discloses do not change the tower pole, reduce the cost, realize the increase -volume transformation simultaneously.