The invention relates to an ecological breeding method for a pig, in particular to an ecological breeding method for a hybrid pig. The method comprises the steps of utilizing an excellent local variety and a foreign variety to conduct hybrid so as to obtain a hybrid generation, and feeding a hybrid piglet, wherein piglet creep feed which can reduce the diarrhea rate is used, high-cost raw materials of plasma protein powder, fish meal, whey powder, maize and the like are not added into the creep feed, thus the feed cost is reduced, new fodder of vinegar residue, alkaloid, yellow mealworm powder, sesame-seed cake dregs, coconut cake dregs, sunflower cake dregs and the like are firstly added into the creep feed, non-drug control of diarrhea is achieved, the disadvantages of an existing creep feed is overcome, the immunity of the piglet is improved, the food consumption and the growth rate of the piglet are increased, the diarrhea rate of the piglet is reduced, the stress-reaction of the weaned piglet is reduced, growth retardation is avoided, the palatability is good, and the pig meat is healthier and safer. Meanwhile, equipment and method that can guarantee heat retaining of the piglet is provided, a waste gas treatment method can make the gas fully recycled and utilized, heat supplying of the pig house is achieved, and the environment inside the pig house is improved at the same time.