The invention relates to a processing technology of feed additive in the breeding industry, in particular to a processing technology using earthworm, rapeseed meal, pine needle and multiple lactobacillus to produce the ecological and nutritious feed additive, which adopts the processing steps that: the dry earthworm is taken with distilled water proportionally added in for immersion, or the freshearthworm is cleaned after defecation, then is arranged in a vessel and hydrolyzed under a certain temperature to obtain the earthworm enzyme solution; the rapeseed meal powder is added and mixed evenly; after the continuous reaction under a certain temperature, the rapeseed meal powder, the pine needle powder and the multiple lactobacillus are proportionally added, sealed and fermented; and the fermentation substance is dried or aired and grinded to obtain the product. The processing technology has the advantages that the product is added in animal feed according to 3% to 7% of the complete mixed feed; production performance of animals can be improved; yield of meat, egg and milk is increased; production quality is improved; production flavor is increased; simultaneously animal immunity can be improved; egg production of laying hens can be improved by more than 10%; yolk color is darker and egg tastes more delicious; pig weight can be increased by about 15%; meat quality is significantly improved; and lean meat percentage is significantly increased.