The invention aims at providing a weaned piglet healthy and environment-friendly fermented mixed feed. According to the weaned piglet healthy and environment-friendly fermented mixed feed, shriveled wheat grains, cotton seed meal, bean dregs, bean curd yellow serofluid and other unconventional feed resources can be sufficiently utilized, weaned piglet organism immunity can be enhanced, the weaned piglet diarrhea rate can be lowered, weaned piglet production performance can be improved, and no antibiotic is included. According to the technical scheme, the weaned piglet healthy and environment-friendly fermented mixed feed is prepared from water, expanded shriveled wheat grains, expanded cotton seed meal, steam explosion bean dregs, spray drying bean curd yellow serofluid, an apple dreg polyphenol extract, hulled corn, fish meal, expanded hulled bean pulp, fish oil, probiotics, glucose, compound premix and the like through fermentation. According to the weaned piglet healthy and environment-friendly fermented mixed feed, the weaned piglet organism immunity can be significantly improved, the weaned piglet diarrhea rate can be significantly lowered, the health level is high, the weaned piglet production performance can be significantly improved, unconventional resources are high in utilization rate, energy conservation and environment protection are achieved, no antibiotic is included, and the safety of the feed is high.