As the key process of weaving, sizing is one of the processes which are of great costly and serious pollution in the whole cotton-textile production chain. It is essential to keep the yarns’ weaving performance while decreasing the pollution. Improving sizing performance, reducing cost and pollution is significant for textile mills to improve the quality of products, efficiency of weaving loom and economic benefit, as well as to realize clean production. For a long time, choosing the right sizing materials and optimizing the sizing process have been what the relative technicians are targeting for. This feature took a deep insight into the development of sizing technology, in terms of application of new equipment and environment-friendly sizing material, management of production and innovation of process.