Laying hen feed additive rich in omega-3 fatty acid and using method of feed additive

The invention discloses a laying hen feed additive rich in omega-3 fatty acid and a using method of the feed additive. The laying hen feed additive comprises the following components in parts by weight: 9 to 10 parts of pepper seed mixed powder, 0.5 to 0.8 part of solid fish oil fatty acid calcium, 0.01 to 0.02 part of 98 percent vitamin C, and 0.004 to 0.006 part of 50 percent vitamin E, wherein the pepper seed mixed powder comprises 1/3 of pepper seed powder and 2/3 of corn powder. When the laying hen feed additive disclosed by the invention is used, a conventional energy feed according to a laying hen feed formula is replaced by an equal amount of the feed additive which accounts for 9.5 to 11 percent of the weight of feed, so that the content of protein in the feed is guaranteed; cheap polyunsaturated fatty acid raw materials (the fish oil fatty acid calcium and pepper seeds) are filtered by laying hens and are accumulated in egg yolk, so that the eggs which are rich in omega-3 fatty ...