In order to investigate the static wind forces on the multi-bundled conductors, based on the wind tunnel force balance tests for rigid sectional models of single and multi-bundled conductors, drag coefficients and the influence of Reynolds number effects and shielding effects were analyzed. The results illustrate that the drag coefficients obtained by the wind tunnel tests are much smaller than those specified in the Code. And because of the surface roughness of the conductors as well as the flow turbulence, the range of Reynolds numbers in the critical region was brought forward. Moreover, although the Reynolds numbers are within the subcritical range, the drag coefficients are still very sensitive to the variance of the Reynolds numbers. For the multi-bundled conductors, the interference caused by the upstream lines reduces the integrated drag coefficients. It is stated that the influences of the shielding effects should be considered. Finally, an empirical formula involving the Reynolds number effects and shielding effects was proposed to calculate the drag coefficients of the bundled conductors, which provides references for calculating the static wind loads of conductors.