NOVELTY - Processing corn straw and white flower chafer comprises mixing corn straw and cow manure, adding effective microorganism (EM) bacteria liquid to corn straw and cattle manure mixture, adjusting carbon (C)/nitrogen (N) ratio; carrying out aerobic and anaerobic fermentation, fermenting mixture of straw and cow manure to obtain mixed feed; feeding mixed feed to white flower chafer larva; and boiling, drying and processing as feed additive, directly feeding or using as fertilizer.    USE - Method for processing corn straw and white flower chafer (claimed).    DETAILED DESCRIPTION - Processing corn straw and white flower chafer comprises:    (A) mixing corn straw and cow manure at weight ratio of 80:20, mixing effective microorganism (EM) bacteria liquid and corn straw and cattle manure mixture at mass ratio of 1.5:1, corn straw and cow manure mixture water content is 60-70%, adjusting carbon (C)/nitrogen (N) ratio to 25:1-30:1; carrying out fermentation at 25 degrees C, aerobic fermentation for 1 day, and anaerobic fermentation for 14 days, fermenting mixture of straw and cow manure to obtain mixed feed;    (B) feeding mixed feed at age 2-3 of white flower chafer larva, feeding 1 ton of corn straw and cow manure mixed feed to 250 kg white flower chafer larvae at room temperature, separating white flower chafer larva after 15-20 days to obtain white flower chafer larva and manure; and    (C) boiling, drying, processing obtained white flower chafer larvae into insect powder as protein additive for livestock and poultry feed, pig, chicken, duck or goose feed; or directly feeding white flower chafer larva to chicken; or white flower chafer larva as feed additive; or white flower chafer larva and manure for vegetable, and corn organic fertilizer.    The EM bacteria liquid is prepared by: mixing EM stock solution and brown sugar at mass ratio of 1:1-500, diluting mixture with water, adding to diluted bacterial liquid 0.01% sodium chloride (NaCl) and iron chloride (FeCl2), where mass ratio of NaCl and FeCl2 is 1:1, and fermenting EM bacteria liquid.