The invention discloses a double-fluid deep-hole bottom fixed-point accurate mixed construction process and a grouting structure. An accurate mixing problem of double-fluid grouting is solved, the matching ratio of the double-fluid can be quantitatively adjusted through a double-high-pressure PVC (Polyvinyl Chloride) grouting pipe, and the setting time is controlled; a double-fluid slurry is mixed at a hole bottom predetermined area, so that a double-fluid grouting range is artificially controlled; with fixed-point accurate double-fluid grouting, the mixing distance and the mixing time of the double-fluid in a drill hole can be reduced, and the dispersion range of the double-fluid slurry is expanded; and the operation can be carried out simply. The technical scheme is characterized in that the double-fluid deep-hole bottom fixed-point accurate mixed construction process comprises the following steps of drilling to the depth of an intact rock, and downwards placing a steel sleeve pipe in a drill hole to the intact rock part; adopting the double-fluid slurry for sealing an outer wall of the steel sleeve pipe and a drill hole wall; continuously drilling to the estimated grouting depth, and downwards placing two grouting pipes in the drill hole; and sealing the grouting pipes and the drill hole wall, and forming dense confining pressure sections outside the grouting pipes.