The invention discloses a method for treating floatation tailings of a waste magnesite-chrome refractory material. The method comprises the following steps: 1) preparing floatation tailings powder ofthe waste magnesite-chrome refractory material; 2) performing acid treatment on the tailings powder in step 1); 3) preparing a chlorinating agent and a carbonaceous reducing agent; 4) mixing the tailings powder after acid treatment, the chlorinating agent and the carbonaceous reducing agent, grinding the mixture, uniformly mixing the mixture, putting the mixture into a tube type resistance furnaceat an air atmosphere, guiding an exhaust pipe of the tube type furnace into a gas washing bottle containing sodium hydroxide solution, roasting the gas washing bottle, recycling volatile components in roasting, taking out residual tailings and cooling the residual tailings as a regenerative raw material of the refractory material. The method is simple, arsenic and antimony can be effectively separated and recycled, the refractory material is recycled, and the influence of discharge of arsenic and arsenic compounds, chromium and chromium compounds, antimony and antimony compounds and the likeon environment can be prevented, so that the method has remarkable economic and environmental benefits.