Calcium chloride, a salt consisting of chlorine and calcium, is CaCl2. Slightly bitter. It is a typical ionic halide, white, hard or granular at room temperature. Its common applications include salt water used in refrigeration equipment, road deicing agents and desiccant. Anhydrous calcium chloride must be stored in a sealed container because it is easy to absorb water in the air and undergo delirium [5]. Calcium chloride and its hydrate and solution have important application value in food manufacturing, building materials, medicine and biology. Calcium chloride has outstanding adsorption ability to ammonia and low desorption temperature, so it has a great application prospect in adsorption and separation of synthetic ammonia. however, because calcium chloride is not easy to form a stable porous material, the contact area with air ammonia is small, and easy to expand and agglomerate in the process of adsorption and desorption, so it is difficult to put into practical application in this respect. The contact area between calcium chloride and ammonia can be greatly improved by loading calcium chloride onto the carrier with high specific surface. Some studies have shown that the composite adsorbent prepared by loading calcium chloride onto molecular sieve has better adsorption performance and stability than single adsorbent.