Emulsified liquid additive for producing poultry feed as well as preparation method and application method thereof

The invention provides an emulsified liquid additive for producing poultry feed as well as a preparation method and an application method of the emulsified liquid additive. The emulsified liquid additive comprises a betaine solution, grease and an emulsifier, the content of betaine in the betaine solution is 10wt%-30wt%, and the grease comprises any one or more of corn oil, vegetable oil, rice bran oil, palm oil and soybean phospholipid. According to the scheme, a betaine solution with a specific concentration, grease and an emulsifier are mixed, and the mixture is emulsified and homogenized to prepare a stable emulsified liquid. The betaine emulsion product can be mutually dissolved with grease, can be added into a meat poultry pellet feed in a mixing stage of feed preparation or in a post-spraying manner, is convenient to use, can effectively solve the problems of easy moisture absorption, easy hardening, inconvenient use and the like in the adding process of pure betaine, is beneficial to improving the ene