The utility model discloses a transformer silica gel respirator positioning mechanism, including a mount, one can the bracketing respirator the base and one can hang the mechanism of hanging at the flange of respiratory tube, this mount includes the fixed rectangle frame of four montants of erectting and these four montants of rigid coupling, these four montants are located respectively fixes rectangle frame four sides angle, this base can connect at the mount by lift adjustment ground dress, sets up the position holes of running through of interval arrangement about a plurality of on this montant, and other sets the halving round pin that can insert arbitrary position hole in these a little position holes, through halving round pin support base. It has following advantage: simple structure, compactness, with low costs, convenient to carry, silica gel change convenient fast.