Abstract: In order to achieve the key parameters of the bolting and anchoring with wire mesh in deep mine roadway, an orthogonal design trial method and numeri cal simulation calculation were applied to study each factor of the bolting and anchoring with wire mesh parameters affected to the rib-to-rib and the roof-to-floor conver gences of the mine roadway. The extremum difference analysis method was applied to the study on the trial results and the key factors of the bolting and anchoring with wire mesh were obtained. The results showed that the bolt space and row distance would be the high influences to the conveniences of rib-to-rib and roof-to-floor of the roadway and the secondary influences to the bolt diameter, bolt length and the pre-tension. Those parameters were the key factors of the support. The engineering prac tice showed that using reasonable support parameters, the surrounding rock deformation of the roadway would be reduced obviously and the surrounding rock stability would be improved remarkably.