The invention discloses a method for functionally modifying a composite material laminated board by using a nano wave absorbing membrane. The method comprises the following steps: (1) preparing nano particles and polyarylether resin into a uniform and stable resin solution; (2) preparing the prepared resin solution into the nano wave absorbing membrane by using a membrane preparation process; (3) sufficiently dipping continuous fiber or a fiber fabric and a resin substrate to prepare composite material prepreg; and (4) paving the nano wave absorbing membrane between paved layers of the composite material prepreg, and preparing the structure/function integrated invisible composite material laminated board by using a composite material forming process. The method has the beneficial effects that the overall wave absorbing function and the mechanical property of a composite material are synchronously improved with great amplitude and low cost as a wave absorbing functional layer is integrated in the preparation process of the composite material laminated board. A product has double functions of excellent bearing and invisibility, and has wide application prospect in the field of aerospace engineering.