Circuit board having improved support fabric structure

The invention discloses a circuit of improved support fabric structure and a support fabric structure. The circuit of improved support fabric structure comprises a support fabric and signal transmission lines, wherein the support fabric is formed through square crossing between a plurality of meridional glass fibre lines and a plurality of zonal glass fibre lines. Each meridional glass fibre linecrosses over one of the zonal glass fibre lines, then goes under at least two of the zonal glass fibre lines, and crosses over another zonal glass fibre line again. A projected joint is formed whenever each meridional glass fibre line crosses over one of the zonal glass fibre lines, and the signal transmission lines are allocated on the support fabric and extend along the meridional glass fibre lines or the zonal glass fibre lines to cross over the projected joints, thus the support fabric structure can reduce the amount of projected joints that the signal transmission lines pass by in order to increase transmission e