Abstract: The irrational use of chemical herbicides leads to various serious phytotoxicity,affecting crop growth and reducing crop yield,which not only threatens global food security,but also destroyes ecological environmental balance.In this paper,we reviewed several effective approaches in preventing and remedying phytotoxicity,discussed the research advances and limitations,and prosposed the future development of intelligent weeding.We concluded that,herbicides mixtures would be very effective in eliminating various weeds and reducing the amount of long-lasting residual herbicides,while sometimes antagonism effects would happen.As an adsorbent,the biochar use would efficiently control the migration and leaching of herbicides in Soils,but the harmful effect on soil and ecological environment was still uncertain.Adding humic acid to soil would reduce the herbicides residues and enhance the herbicide efficacy on crops.Auxiliaries such as safeners would protect crop seeds,enhance crop resistance and reduce crop phytotoxicity.Bio-herbicides would control weed populations and prevent herbicide-resistant weed development without degrading the environment,but their research and application still had a long way to go.Microbial degradation of residual herbicides was greatly affected by microbial species and environmental factors.The cultivation of herbicide-resistant varieties would reduce the use of herbicides,but the safety of genetic means remained controversial.The intelligent weeding method would regularly and quantitatively eliminate weeds,improve crop safety and reduce herbicide pollution.