Abstract: The phenolic pultruded grating which can be used in ship and ocean engineering is produced. The effects of mesh number, specific gravity and functional diluent of porcelain aggregate on the interfacial adhesion between resin and glass fiber in marine composite gratings are studied. When 30% ceramic aggregates with particle size of 6.5 μm and 10% functional diluents are added in the system, the failure load strength of the grating before fire is 368.76 MPa, and the structural fire integrity of the grating, fired for 1 h according to the standard temperature rise curve, reaches the level of L2.