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Natural materials show a special combination of remarkable strength and toughness. Therefore, inspired by nacre's "brick-and-mortar" architecture, high-performance multifunctional plant protein adhesives were constructed through an organic-inorganic hybrid structure and vitrimer networks. Hydroxyl-functionalized boron nitride (BN-OH) nanosheets firstly acted as the "brick" part, and protein chains were thought of as the "mortar" part. BN-OH can not only enhance the toughening through interlayer interface slip, but also achieves synergistic toughening effect with the nanometer effect. Glutaric dialdehyde (GD) acted as a "bridge" between protein chains and BN-OH, which can react with the condensation of hydroxyls in BN-OH or with active amino groups in protein chains to form dynamic covalent bond (vitrimer networks) to dissipate energy. Therefore, the synthesized multiple crosslinked network plant protein adhesives have excellent wet shear strength (1.28 MPa), water resistance, mildew-resistant, flame-retardant, and ultrahigh thermal management capability (3.88 W m−1 K−1), and has wide application potential in green adhesives. [Display omitted] • A high-performance plant protein adhesive was inspired by nacre design. • The BN-OH nanosheets were set as the "brick" part. • Plant protein chains were thought of as the "mortar" part. • Organic-inorganic hybrid and vitrimer networks enhanced the adhesive's strength. • Adhesive shows excellent mold resistance and thermal management capability. [ABSTRACT FROM AUTHOR]