The invention relates to a technical method for continuous and safe discharge of dry tailings in a collapsing subsidence area. Devices selected for the method are an ordinary belt machine, a tailing discharge machine and a bulldozer or a loader. The method includes the following specific steps that (1) the field is leveled, and the devices are installed and started after debugging and acceptance; (2) the dry tailings discharged from a pressing-filtering workshop are discharged into a receiving hopper on the rear portion of the tailing discharge machine through the ordinary belt machine, and the tailing discharge machine discharges the dry tailings to the collapsing subsidence area; (3) the tailing discharge machine moves forwards, leftwards and rightwards gradually so that the dry tailings can be discharged within a one-step-distance fan-shaped range of the collapsing subsidence area, and the bulldozer or the loader conducts leveling and tight pressing; (4) when the one-step-distance fan-shaped range is fully loaded with the dry tailings through discharging, the ordinary belt machine extends by the length of one-step-distance, and the step (3) is executed repeatedly and dry tailings are discharged continuously in the next step-distance fan-shaped range; (5) the step (4) is executed repeatedly and continuously till discharge of the dry tailings in the whole collapsing subsidence area is finished. The method is simple and reliable, capable of achieving continuous and safe discharge and high in production efficiency.