The grass cutting, rubbing, and crushing machine is a multifunctional agricultural equipment that integrates cutting, rubbing, and crushing. It is widely used in breeding, planting, and straw recycling scenarios, and is suitable for various materials such as corn straw, wheat straw, pasture grass, weeds, and tree branches. Powered by an electric motor, gasoline engine, or diesel engine, the machine uses internally rotating high-speed cutters and rubbing structures to first cut the material to an appropriate length and then further rub and crush it, resulting in a soft, finely and evenly crushed material that is easy for livestock to ingest and digest. It can also be used for straw returning to the field and biomass fuel processing. The equipment is easy to operate and flexible to move, and is divided into small household models (suitable for small-scale farming by farmers), medium commercial models (suitable for small and medium-sized farms and cooperatives), and large assembly line models (suitable for large-scale farming and straw processing plants). It combines the characteristics of high efficiency, durability, and easy maintenance, solving the problem of straw processing while improving feed utilization. It is a necessary equipment for breeding and resource utilization of agricultural waste.