The invention discloses an alternating-current extra-high voltage rectilinear angle steel tower ground wire support pitch point structure, wherein first angle steel, second angle steel, third angle steel, fourth angle steel, fifth angle steel and sixth angle steel are jointly connected with principal material angle steel through a gusset plate and a bent plate. A first limb of the second angle steel is in bolted connection with a limb of the principal material angle steel through a bolt. Besides, a second limb of the second angle steel is connected with the bent plate, the bent plate is in bolted connection with both the fifth angle steel and the sixth angle steel, so that tightness between the angle steel of a ground wire support pitch point is enhanced, the rigidity of the ground wire support pitch point is improved, and bending resistance and torsion resistance of a ground wire support are boosted. Besides, a first limb of the fifth angle steel extends into a second limb of the principal material angle steel and is in bolted connection with a second limb of the principal material angle steel, a second connecting plate of the gusset plate and a first limb of the fourth angle steel at the same time, and therefore the situation that a negative head between the fifth angle steel and the principal material angle steel is too large and is not beneficial to transmission of axial force is avoided.