The invention relates to the technical field of metallurgy and discloses a new method for removing impurities in tellurium electrolyte. According to the method, the wet process for preparing qualified tellurium electrolyte by removing lead through purification, depositing tellurium through hydrolysis and dissolving tellurium dioxide through sodium hydroxide is adopted; after the lead is removed through sodium sulfide, a solution is subjected to neutralizing treatment through hydrochloric acid, and the pH is adjusted to 5-5.5; sodium tellurite (Na2TeO3) and sodium selenite (Na2SeO3) are hydrolyzed to generate tellurium dioxide (TeO2) and selenium dioxide (SeO2) respectively; the selenium dioxide has good solubility and can be dissolved into water and inorganic acid easily, and the tellurium dioxide has poor solubility within the pH range of 5-5.5; selenium and the tellurium are separated preliminarily; finally, tellurium dioxide is subjected to alkali dissolution and filtration to obtain the qualified tellurium electrolyte. By means of the method, purification and impurity removal of the tellurium electrolyte with high lead and selenium contents are effectively realized; the technological process is simple, the quantity and varieties of adopted raw materials are fewer, and the production cost is effectively lowered; energy consumption is less, and the recovery rate of the tellurium is high.