Mesh fabric reinforced polyurethane coating is a typical type of fiber reinforced polymer composite structure. Some designers proposed to replace the substrate material of the fabric reinforced polyurethane coating with the polyurea material. However, there is a lack of research on the analysis and design of this kind of structure. This study investigated the coupling effect between the mesh fabric and polyurea substrate and explored the mechanical behavior and failure pattern of the mesh fabric reinforced polyurea coating. The deformation behavior and load-carrying capacity of the composite coating were also analyzed compared with the traditional fiber reinforced polyurethane composite coating. The main conclusions are as follows: Fabric fiber fracture leads to instantaneous stress pulse in the polyurea substrate, fiber fracture surface, and stress-pulse-induced microcracks lead to the overall cross-section pull-off failure. The polyurea material exhibits a higher strength (10 MPa∼30 MPa). Mesh fabric induced defects lead to a strength decrease of 12.2 % and an elongation decrease of more than 90 %. The mesh fabric could undermine the strength and deformation capacity of the polyurea substrate, playing a negative role in the material's performance. The polyurethane material generally exhibits a lower strength of no more than 10 MPa. The mesh fabric could increase the tensile strength by 14 times. The mesh fabric could increase the strength of the polyurethane coating substrate, bringing a certain strengthening effect. The mesh fabric can be adopted to strengthen the substrate when the substrate material's tensile strength is lower than that of the mesh fabric. When the substrate tensile strength exceeds the strength of the mesh fabric, it is not recommended to use the mesh fabric.