The invention discloses a vegetation anchor rod slope fixing method. The method comprises the following steps that a planned slope surface is leveled by a mechanical method or an artificial method; aplurality of cutting holes which are arranged in a longitudinal and transverse matrix mode are formed in the planning slope surface, the depth of each row of cutting holes is gradually increased fromtop to bottom, and the depths of every two adjacent cutting holes in each row are different; an erythrina indica branch is planted in each cutting hole, and the depth of the cutting hole is filled with the stem of the erythrina indica branch. According to the vegetation anchor rod slope fixing method, the weight of a base can be changed according to needs, so that the base can be conveniently moved and stored, and the practicability is improved. Meanwhile, the manufacturing cost of slope fixing is reduced, the construction process is simplified, the reinforcement of a slope is guaranteed, andthe recovery and protection on the ecological environment is facilitated.