The invention belongs to the field of treatment of wastewater generated by natural rubber processing, and particularly relates to a method for treating wastewater generated by natural rubber processing. An up-flow anaerobic ammoxidation reactor is utilized to treat wastewater generated by natural rubber processing by using an up-flow anaerobic ammoxidation technique, thereby achieving the goal of denitrification and enabling the wastewater to reach the standard. The treatment method is simple, has favorable treatment effect, and can reach the standard in the aspects of COD (chemical oxygen demand), ammonia nitrogen an total nitrogen.