The invention relates to a method for comprehensively recycling valuable metal from arsenium-containing smoke and using arsenium as a resource. The method includes the following steps that normal-pressure water leaching is conducted; leachate is selectively reduced and purified; leaching residues are washed; and the value metal is recycled from the washed residues. According to the method, the soluble arsenium in the smoke is removed out through normal-pressure water leaching, and all valuable elements are recycled to the maximum extent by conducting the procedures, such as washing, reduction smelting and oxidation blowing, on the leaching residues. According to the method, the arsenium is removed out of the smoke and is made to enter the leachate, impurities such as lead and tin are removed through the manner of conducting purification and impurity removal on the leachate, the purified leachate is used for arsenic salt purification of a zinc sulfate solution in zinc hydrometallurgy, and therefore separation of the arsenium and the valuable metal is achieved in a harmless manner. The resource comprehensive utilization rate is high, the raw material application range is wide, and the problem of pollution in the extraction process of a traditional process is solved. The method has more obvious beneficial effects particularly for the smoke generated in the lead and zinc smelting process.