As the development concentration of Chinese cement industry according to the 2th Five-Year Plan Extending the industry chain has been considered the only road for Chinese cement enterprises to upgrade and transform. In recent years, more and more cement companies are trying diversified development in the upstream and downstream industry field and marching to the sand-stone aggregate industry becomes the first choice to realize upgrading and transforming. Cement enterprises possess abundant limestone resources which meet the constantly increasing market demand. Cement companies can reuse the large amount of waste limestone with low grade and extra magnesium oxide which can be applied in the cement production to the sand-stone aggregate production line. This method not only makes full use of the resources but also gains great environment and economy benefits. There are many machines to make sand-stone aggregates with different features and qualities, so how can we choose the best one from them? Crushers are the most important equipment that needs to be selected carefully. First, we need to consider the mineral elements if we want to choose the proper crusher type. Second, selecting reliable machine supplier is also important because the supplier market share and actual using effect are the most useful reference indexes. Among so many crushers, which one may be the suitable machine for the production line of sand aggregate considering all factors? The answer is the ore milling equipment which has owned three main advantages for customers. One, it can produce very fine crushing granularity and is not afraid of very hard and wet materials. Two, it is quite simple to maintain and suitable for middle and small enterprises. Three, it is effective and energy saving which saves the running cost of the equipment.