The invention discloses a method for removing arsenic from lead anode mud and belongs to the technical field of thermometallurgy. According to the method, at first, the lead anode mud is dried and dehydrated, the lead anode mud is roasted and treated on the vacuum condition, arsenic oxide and simple substance arsenic in the lead anode mud are volatilized at a high temperature, and the purpose of arsenic removing is achieved; and by adding a carbon layer on the upper portion of a lead anode mud raw material, volatile toxic arsenic oxide is reduced into low-toxicity single-substance arsenic. According to the method, the flow is simple, the arsenic removing effect is remarkable, only by means of vacuum volatility, arsenic in the lead anode mud can be removed by over 90%, the direct recovery rate of other valuable metal Ag and Cu is 99%, and the direct recovery rate of Pb is 95%. The method is low in investment cost and high in economic benefit, and has a very good industrialized prospect.