Cellulose ether is a kind of non-ionic semi-synthetic polymer, water soluble and solvent two kinds, in different industries caused by the role is different, such as in chemical building materials, it has the following compound effect: ① Water-retaining agent ② thickening agent ③ leveling ④ film forming ⑤ binder downstream industry situation of cellulose ether Cellulose ether as "industrial monosodium glutamate", cellulose ether added a low proportion, a wide range of applications, downstream industry dispersed in all walks of life in the national economy. Under normal circumstances, the downstream construction industry and real estate industry will have a certain impact on the growth of building materials grade cellulose ether demand. When the domestic construction industry and real estate industry growth faster, the domestic market for building materials grade cellulose ether demand growth faster. When the growth of the domestic construction industry and the real estate industry slows down, the domestic market for building materials grade cellulose ether demand growth will slow down, make the competition in the industry more intense, accelerate the process of survival of the fittest industry enterprises.Since 2012, in the domestic construction industry and real estate industry slowing down the environment, the domestic market for building material grade cellulose ether demand did not fluctuate significantly. The main reasons are as follows: first, the overall scale of domestic construction industry and real estate industry is large, and the total market demand is large; The main consumer market of building materials grade cellulose ether has gradually expanded from economically developed areas and first - and second-tier cities to the Midwest and third-tier cities, and the growth potential and space of domestic demand has expanded. Two, the amount of cellulose ether added to the proportion of building materials cost is low, the amount of a single customer is small, customer dispersion, easy to produce rigid demand, the total demand of the downstream market is relatively stable; Three, the change of market price is an important factor affecting the change of building material grade cellulose ether demand structure, since 2012 building material grade cellulose ether price drop is large, so that the high-end product price drop is large, attract more customers to purchase and choose, increase the demand for high-end products, and squeeze the market demand and price space of ordinary products. The degree of development of the pharmaceutical industry and the growth rate of the pharmaceutical industry will affect the change of the demand for pharmaceutical grade cellulose ether. The improvement of people's living standard and developed food industry is conducive to driving the market demand for food grade cellulose ether.