The invention relates to windage yaw prevention treatment of transmission towers, in particular to a straight line pole inverted V-shaped string center line pull-down windage yaw prevention method. The method comprises the following steps: taking a center bolt of a vertical double-split conductor suspension clamp framework below a center line insulator of a power transmission line iron tower serves as a hanging point, enabling the head ends of two composite insulators to be connected to the center bolt, and enabling the tail ends of the two composite insulators to be connected with the two sides of a pole head respectively; after connection, enabling the two composite insulators to form an inverted V-shaped string. According to the invention, the method can solve the windage yaw fault of apower transmission line and thoroughly prevent windage yaw.