【Background】Flaveria bidentis (L.) Kuntze is a dangerous invasive weed which has strong competitiveness and vigorous growth. Tenebrio molitor L.is an omnivore, and can make use of various biomass resources. It is also an important laboratory insect, with demands on artificially reared larvae and adutls for varipus purposes. 【Method】We used F.bidentis, pakchoi cabbage and watermelon peel as greenfeed to make artificial diet, and the influence of feeding F.bidentis on the growth, development and reproduction ofT.molitor were registered. 【Result】When we added some proportion of F.bidentis to larval diet, the growth rate was reduced, and the efficiency of diet utilization and mortality were increased in contrast to adding some pakchoi cabbage. When we added F.bidentisto the adult diet, the average longevity was significantly extended, while oviposition per female was significantly reduced, and the body length of emerging adults was shortened nonsignificantly. 【Conclusion and significance】A preliminary calculation of conversion efficiency of F.bidentisby T.molitorindicated that although T.molitor could feed on F.bidentis, the conversion efficiency was not very good.