The invention discloses a premixed biological feed and a compound feed for a pig at the stage of fattening. The premixed biological feed comprises the following components according to certain percentage: 0.10 percent of vitamin A, 0.02 percent of vitamin D, 0.2 percent of vitamin E, 0.05 percent of vitamin K3, 0.03 percent of vitamin B2, 0.01 percent of vitamin B6, 0.02 percent of vitamin B12, 0.09 percent of calcium pantothenate, 0.17 percent of nicotinic acid, 5.00 percent of choline, 4.5 percent of FeSO4 H2O, 0.5 percent of antioxidant, 0.8 percent of copper sulfate, 3.5 percent of monohydrate zinc sulphate, 0.8 percent of manganese sulfate, 0.45 percent of selenium with 1% of mass concentration, 0.32 percent of iodine with 1% of mass concentration, 1 percent of concentrated enzyme, 10 percent of Chinese herbal medicine additive, 12 percent of lysine, 1.5 percent of sweetener, 4 percent of flavouring agent and 54.94 percent of zeolite. The compound feed comprises the following components according to certain percentage: 60.17 percent of corn, 20 percent of bean pulp, 12 percent of rice bran, 5 percent of rice bran, 0.51 percent of calcium hydrophosphate, 1.07 percent of mountain flour, 0.25 percent of salt and 1 percent of premixing biological fodder. The premixed biological feed has low copper content and contains no arsenic and antibiotics, and the compound feed can lead such biomasses as corn, bran, rice bran and the like to be fully digested and absorbed. The feed utilizing rate is high, the cultivating cost is low, the disease resisting capability is strong, the meat quality is safe, and the environmental pollution is low.