This paper proposes a novel preparation process utilizing composite materials for the flexible bionic wings of hovering flapping wing micro air vehicles (FWMAVs), addressing issues such as excessive mass and inertia, low flapping efficiency, and limited service life. The process employs lightweight, tear-resistant Cuben fabric as the wing membrane, combined with carbon fiber prepreg curing to form the wing veins. It also incorporates laser cutting, selfbonding technology, and a standardized thermal curing process, significantly enhancing the performance of the bionic wings. Experimental results demonstrate that, compared to traditional processes, the bionic wing prepared using this process reduces mass by 53.6%, increases flapping efficiency by 1–2 gf/W (approximately 40%), and exhibits no significant damage during high-frequency, long-duration flapping, thereby substantially extending service life. Meanwhile, comparative experiments reveal no significant difference in aerodynamic performance between flexible bionic wings with simplified wing veins and those with insect-like veins, offering a new perspective for the optimal design of bionic wings. Furthermore, flight experiments validate the practicality of the proposed bionic wing fabrication process, laying a foundation for performance enhancement and practical application of hovering FWMAVs.