The traditional classification of polyurethane elastomers is based on processing methods, which are divided into cast polyurethane elastomers, mixed polyurethane elastomers and thermoplastic polyurethane elastomers.

Due to different raw materials, synthesis and processing methods, and application purposes, reaction injection polyurethane elastomers (RIMPU) and solution-dispersed polyurethane elastomers have emerged. According to the formed form, it is divided into solid system and liquid system.

It is also divided according to the chemical composition of raw materials. Generally, there are polyester or polyether, so there are polyether polyurethane elastomer and polyester polyurethane elastomer.