The invention discloses a method for carrying out slag fishing work through slag fishing treatment equipment. The method involves a capping box, a slag fishing box is fixedly arranged in the capping box, a rotary cavity is fixedly formed in the slag fishing box, and a rotary assembly is arranged in the rotary cavity. The rotary assembly achieves rotation in different rotating directions, the stirring speed of the equipment is increased, the stirring efficiency of the equipment is improved, a stirring cavity is formed in the lower end wall of the rotary cavity, a stirring assembly is arranged in the stirring cavity, mixing of an impurity adsorbent and impurities is promoted through the stirring assembly, and the adsorption rate is increased. The equipment is simple in structure and convenient to operate, sewage is stirred through the rotary assembly and the stirring assembly, the stirring efficiency and quality are improved, the adsorption capacity of the impurity adsorbent and the impurities is improved, the speed of sewage deslagging is increase, and the efficiency of sewage deslagging is improved; secondly, by means of the automatic work mode, manual participation is reduced, thelabor cost is reduced, automatic and precise operation of the equipment is achieved, and the reliability of the equipment is improved.