1. It has good fluidity, easy sand mixing, smooth casting surface and high dimensional accuracy. 2. It has low free aldehyde content, small odor and less smoke during operation, and has good environmental performance. 3. It can be used in the production of cast steel, cast iron and non-ferrous metal castings. It has excellent curing performance, high strength, good air adaptability and easy stripping. 4. Sand molds are easy to collapse and regenerate, which can reduce casting production costs.