The invention discloses a novel reinforcing tower design method for a bottom-protecting power grid, and the method comprises the following steps of S1, verifying the slope change of an original towertype tower body, the root opening of a connecting leg and the specification and size of the original tower type tower body, and compiling a single line diagram of a reinforcing tower; S2, according tothe path direction, the wire scheme and the condition of the cross span distance, planning the use condition of a reinforced tower; S3, establishing a three-dimensional model, and carrying out finiteelement stress analysis and calculation; and S4, drawing a reinforced tower commanding chart.