The invention provides a double functional layer type weeding method used in an organic rice field. The method is used for field weeding by creating double functional layers by means of the ecology principle according to the paddy field weed generating rule and ecology principle based on the condition of organic rice cultivation. According to the method, an organic reduction layer and a poplar leaf covering layer are created on the earth surface, and the harm caused by weed generation in the rice field can be effectively controlled by means of different functions of the organic reduction layer and the poplar leaf covering layer. Compared with existing organic rice field weeding methods, the weeding method has the advantages of being good in weeding effect, capable of improving the fertility of soil, reducing cost and improving efficiency, ecological, environmentally friendly, easy and convenient to implement and the like.