This invention provides a dental
silicone rubber impression composition, a material kit, and a method for preparing the same. The impression composition includes a reinforcing filler with a nanometer-sized particle size, and the
particle size distribution of the reinforcing filler satisfies D[4,3]-D[3,2]=A, where A is 0~200nm. The above-mentioned solution provided by this invention ensures that the dental
silicone rubber impression material has lower roughness while maintaining its mechanical properties. It also avoids the agglomeration of reinforcing particles within the
silicone rubber matrix, which could affect the overall flowability of the impression material, and improves
processing difficulty. Furthermore, the impression material exhibits a faster curing speed.