Abstract: Composite dry-fiber wound reinforced structure could be used to solve the problems of the poor impact resistance and failure of resin under the low temperature of filament winding resin matrix composite structure. In the process of filament winding for dry-fiber reinforced structure, the overlap and compression of the fiber bundle resulting in different thicknesses of dry-fiber wound reinforced layers have an effect on the stability of the winding pattern. The variation in the thickness and distribution law of dry-fiber wound reinforced layers based geodesic were studied winding to make sure the winding pattern stable. The influence of yarn width, pore size and core structure etc on the thickness variation of the dry-fiber reinforced layers was analyzed. The mathematical model of the dry-fiber wound reinforced structure was updated one by one considering the variation of the thickness of the mould. Then the winding trajectory was calculated and the geodesic winding pattern was acquired. Finally, the winding experiment of the dry-fiber wound reinforced layers was carried out taking vessel as example. The thickness of the reinforced layers obtained by theoretical simulation is accurate. The winding pattern is stable, the phenomenon of slipping of fiber doesn't exist. The feasibility of the calculation method of fiber thickness and winding trajectory and the correctness of simulation of dry-fiber reinforced layers thickness are verified.