The invention provides an analytical method for determining tellurium in high-selenium tellurium slag. According to the analytical method, a sample is dissolved in nitric acid and sulfuric acid, sulfuric acid smokes to volatilize and remove selenium in a bromide form, high-valence tellurium (VI) is quantitatively reduced into low-valence tellurium (IV) in a hydrochloric acid medium with the concentration higher than 10mol/L, the interference of chloride ions is eliminated by silver sulfate in a silver chloride precipitate form, low-valence tellurium (IV) is quantitatively oxidized into high-valence tellurium (VI) by potassium hypermanganate, excessive potassium hypermanganate is reduced by ferrous sulfate, and therefore, the content of tellurium in a sample is indirectly determined; tellurium in the high-selenium tellurium slag is analyzed and determined by carrying out indirect titration on ferrous sulfate through taking hydrochloric acid as a reducing agent and a complexing agent and potassium hypermanganate as an oxidizing agent, so that the predicament that tellurium in the high-selenium tellurium slag is difficultly and accurately determined in a recovery process is solved. The method has the advantages of good separation effect, high recovery rate, high accuracy, and the like.