Molecular sieve 3A-IG can deeply co-adsorb the resident moisture and organics in insulating glass, keep the insulating glass clear and transparent even at very low temperature. More important, it can successfully avoid the tremendous air pressure unbalancely placed on the glasses, which was superposed by seasons of day?Cnight temperature changing and the ensuing air desorption and adsorption function of common insulating glass desiccant. Thus it resolves the problems of windows distortion caused by insulating glass inflation and shrink, expanded the life span of insulating glass windows.