The invention discloses a gold tailing multistage purification treatment technology. With the treatment technology, by multistage purification treatment on gold tailing, quality of circulating water in a circulation water tank can be guaranteed, reliability of beneficiation production is improved, consumption of supplementary water in beneficiation process is reduced; by processing the gold tailing with five chemicals and two additives, various heavy metal ions, which are not difficult to deposit, in the tailing can become precipitate, thus, disturbance of the heavy metal ions to the beneficiation process is reduced; due to multistage purification treatment on the gold tailing, water content of the gold tailing in a sludge tank is guaranteed to be less than 9%, the tailing can be used as raw material for mine filling or raw material of building materials, thus, dependence on a tailings dam is dispensed thoroughly, ecological environment is protected to the greatest extent, and potential safety hazard of the tailings dam is reduced.