The utility model discloses a test model of alternate flashover of simulation single wire transmission line windage yaw, including first aluminum stranded conductor (1) and second aluminum stranded conductor (2), first aluminum stranded conductor eradicate through at least four and supports along the pillar, the second aluminum stranded conductor eradicate through at least four and supports along the pillar, the both ends of first aluminum stranded conductor are connected with earth connection (11), the second aluminum stranded conductor is connected with the experimental vary voltage system of power frequency. Double -phase wire reduced at certain partly clearance distance by a wide margin after this test model can effectively simulate the wire windage yaw, and other parts still keep safe clearance distance's the circumstances. Simultaneously, this model also changes minimum space clearance distance, the flashover characteristic of double -phase wire under different clearance distance in the simulation windage yaw condition lower gear distance in accessible adjustment insulator chain position.