Straw pretreatment equipment for sheep feed

The invention discloses straw pretreatment equipment for sheep feed. The straw pretreatment equipment for sheep feed comprises a straw crushing device, a filtering device, a steam treatment pipeline,a microbial decomposition device and a conveying device, wherein an outlet of the straw crushing device is connected with a feeding hole of the filtering device; the conveying device and the steam treatment pipeline are arranged between a discharging hole of the filtering device and a feeding hole of the microbial decomposition device; the steam treatment pipeline is a pipeline with a cavity; a steam spray head is arranged on the wall of the cavity; and the conveying device penetrates through the cavity of the steam treatment pipeline and conveys crushed straws to the microbial decomposition device. The filtering device comprises a rotating deflector rod, a rotating deflector rod shaft and a power device, and the power device drives the rotating deflector rod to rotate with the rotating deflector rod shaft as the