The invention provides a two-layer floor based on a beam bridge structure. The two-layer floor is characterized by comprising core boards, edgings, a veneer and reinforcing strips, wherein the core boards, the edgings and the reinforcing strips constitute a floor base material, the edgings are connected with the two sides in the width direction of the core boards in a splicing mode, and one or more reinforcing strips are added to the middle of the two core boards. A processing technology of the two-layer floor includes the first step of splicing the core boards, the second step of determining the thickness of the core boards, the third step of assembling the floor base material, the fourth step of determining the thickness of the floor base material, the fifth step of covering the floor base material with the veneer, and the sixth step of forming the floor. The two-layer floor has the advantages that firstly, the two-layer floor is easy to lay, low in cost and small in residual stress; and secondly, due to the beam bridge structure, air on the back of the laid floor can circulate, the deformation probability of the floor is reduced, the quality level of the two-layer floor can be remarkably improved, and the life cycle of the two-layer floor can be remarkably prolonged.