The utility model relates to a bridge deck slab of a double-trapezoid shape. The bridge deck slab of the double-trapezoid shape comprises a flat plate and regular hexagon hollow pipe deck slab profiles. The lower portion of the flat plate is connected with multiple bridge deck slab profiles of a double-trapezoid shape, and the multiple bridge deck slab profiles of the double-trapezoid shape are connected together. Each bridge deck slab profile of the double-trapezoid shape comprises two isosceles trapezoids, wherein the two isosceles trapezoids are arranged vertically in an opposite mode. Every two bridge deck slab profiles of the double-trapezoid shape are connected through one regular hexagon hollow pipe deck slab profile directly or in a mutually staggered mode. According to the bridge deck slab of the double-trapezoid shape, every two bridge deck slab profiles of the double-trapezoid shape are connected together directly or in the mutually staggered mode, the inside of each bridge deck slab profile of the double-trapezoid shape comprises two isosceles trapezoids which are arranged vertically in the opposite mode, and therefore the bridge deck slab of the double-trapezoid shape has the advantages of being quite high in supporting strength, simple in structure, low in cost and not prone to damage at the time of bearing.