The invention discloses a technique for constructing an artificial waterproof ore pillar through an access back-filling stoping method. The technique comprises the steps that firstly, an ore body with the position of the waterproof ore pillar reserved is subjected to upward or downward access stoping; high-mark cemented filling is conducted, so that the artificial ore pillar is formed; and after the artificial waterproof ore pillar reaches the designed strength index, other ore bodies are extracted according to the normal sequence and the normal technique. According to the technique for constructing the artificial waterproof ore pillar through the access back-filling stoping method, a traditional extraction technique according to which a large-thickness waterproof ore pillar needs to be reserved when an ore deposit under a water body or around the water body is extracted, and consequentially the resource loss is caused is changed; the ore body near a water-bearing stratum or a water-guiding fault is extracted through the access back-filling stoping method good in safety performance firstly, the high-strength filling body artificial waterproof ore pillar is formed after filling, and then the ore resources under the water body or around the water body are extracted according to the normal sequence and the normal technique under the protection of the artificial waterproof ore pillar. According to the technique, due to the facts that the waterproof ore pillar is recovered in advance and the quality of the artificial waterproof ore pillar can be controlled, the extraction rate of resources is increased, the extraction safety of the ore deposit under the water body or around the water body is improved, and the economic benefits and the social benefits are remarkable.