On the basis of medium-alkali or non-alkali glass--Woven fabrics, the exclusively external wall insulation mesh is developed through alkali-resistant coating. With excellent strength and alkali resistance, the product play an important role in the insulation system, mainly prevent cracking. Due to its good performance on chemical resistance such as acid and alkali resistance and its strong tensile strength toward transversal and longitudinal direction, the product is able to evenly distribute the stress of the external wall insulation system, prevent insulation structure from deformation resulted from collision and squeezing and also enable the insulation layer to have an excellent performance on impulsive force resistance. In addition, the construction and the quality control can be easily undertaken; Therefore, it is regarded as "soft steel bar" of the insulation system.