confirming the node has the potentiation to the tensile breaking strength of mesh, analyzing the influence factor to the alkali resistant breaking strength; measuring and testing the node strength of the mesh. from the test result we know that the alkali resistant coating has a certain reinforcement to the mesh tensile breaking strength. through the comparison of the the alkali resistant coating mesh soaking in the alkali resistant mesh alkali liquor, and the alalysis of the SEM atlas and the test of the tensile breaking strength, the friction force of the fibers and the quality of alkali resistant coating surface. the mesh alkali resistant tensile breaking strength is mainly determined by the glass fiber tensile breaking strength.