The invention relates to straw material particle processing equipment. The straw material particle processing equipment comprises a pulverizer, a secondary crushing device, a conveyor, a stirring buffer cylinder, a granulator, a lifting machine and a cooling screening tower, wherein the pulverizer, the secondary crushing device, the conveyor, the stirring buffer cylinder, the granulator, the lifting machine and the cooling screening tower are sequentially arranged from left to right, the discharge port of the crusher is connected with a buffer hopper through a pipeline, and the bottom end of the buffer hopper communicates with the top end of the secondary crushing device. According to the straw material particle processing equipment, the discharging amount is large, the discharging efficiency can be improved, crushed material particles can be buffered, and meanwhile the dust-proof effect is achieved; due to the arrangement of the secondary crushing device, the crushing is more thorough, and the quality of subsequent granulation is improved; and through the arrangement of the cooling screening tower, countercurrent cooling is adopted, so that the cooling effect and efficiency are improved, screened powder can be recycled, the quality of the particles is guaranteed, straw materials are fully utilized, and the granulating efficiency and the yield are improved.