A boat hull shield device comprising a bracket member attached to the tongue of a trailer. An adjustable shield-support assembly is fastened to the bracket member and extending upwardly therefrom. A pair of planar shield members is adjustably attached to the shield support assembly, with the shield members each positioned to one side of the bracket member in an open V configuration. A pair of linear brace members further stabilizes the shield members. Each brace member is secured at a first end to one shield member and at a second end to the upright support fastened to the tongue of the trailer. The planar shield members are rotationally adjustable relative to a horizontal axis, which is perpendicular to the trailer tongue and pivotally adjustable relative to a vertical axis, that is perpendicular to the trailer tongue.