The invention relates to a cyaniding tailings filling treatment technology. The technology comprises the following steps: (1) after conveying tailings slurry to a stirring tank, adding lime and uniformly stirring, and conveying to a thickener through a pipe, wherein the pipe is internally connected with a pipe laminar flow mixer, and an oxidizing agent is added; (2) after enabling treated ore pulpto enter the thickener, adding a flocculant to perform flocculating settling, recycling overflow water, conveying an underflow to a stirring machine; and (3) adding cement and a stabilizer to the underflow in the stirring machine, after uniformly stirring, and conveying to a mine worked out section for filling. Cyaniding tailings is sampled in different periods after treated by the above technology and cured in the mine worked out section, and a cured product is leached according to an HJ/T299-2007 method, wherein a pollutant content index in leachate is lower than a standard of GB5085.3-2007. The technology is short in process, remarkable in treatment effect, high in efficiency, and capable of solving a potential safety hazard of the cyaniding tailings piled and stored in a tailings pond.