The invention discloses a method for recycling 
chromium from 
chromium passivation wastewater of an electrolytic 
manganese factory. The method is characterized by comprising the following steps of: adding 
hydrogen peroxide into the 
chromium passivation wastewater, oxidizing Cr(III) into Cr(VI), adding 
sodium hydroxide into liquid to remove impurities, such as Mn and other 
metal ions, adjusting pH and adding Pb<2+>, washing the obtained precipitate part by using water, 
drying and preparing 
powder to obtain 
chrome yellow, adjusting pH of supernate, adding aluminum 
sulfate, stirring, reacting andperforming 
solid-liquid separation, wherein the obtained supernate is used for washing the negative plate of the discharged 
manganese of the electrolytic 
manganese factory. By the method, the chromium recycling rate is over 99 percent, the impurities, such as manganese and other 
metal ions are removed, purity of 
chrome yellow in the product and the product quality are improved, the chromium content in 
sludge is reduced through recycling and recovering of chromium in 
wastewater, the 
sludge does not belong to risky 
solid wastes, the wastewater can be used for washing the negative plate of the discharged manganese of the electrolytic manganese factory, the policy of 
energy conservation and emission reduction, recycling of resource, and cyclic utilization is met, and economic benefit is brought to relative industry.