The load softening temperature of refractory materials refers to the temperature at which refractory products undergo deformation under constant load under continuous heating conditions. It represents the ability of refractory products to resist both high temperatures and loads, to some extent indicating the structural strength of the products under similar usage conditions. The main factors affecting the load softening temperature of refractory products are their chemical mineral composition and microstructure. Improving the purity of raw materials, reducing the content of low melting materials or fluxes, increasing molding pressure, and producing high-density bricks can significantly increase the load softening temperature of the product.