The invention discloses a preparation method of tea feed. The method includes the following steps that firstly, tea leaves are soaked in water, the tea leaves are expanded after being taken out, and the expanded tea leaves are prepared; secondly, animal oil and vegetable oil are taken and mixed to prepare compounded grease, emulsifiers, water, zinc lactate, lactic acid or citric acid, sucrose or glucose and sodium cyclamate are added into the compounded grease and are evenly mixed, finally, homogeneous processing is performed, and emulsified fat pulp is prepared; thirdly, the emulsified fat pulp is sprayed to the expanded tea leaves, the tea feed is obtained after even mixing, or the tea feed is obtained through drying after even mixing. The technology is simple and implementation is easy. The prepared tea feed is rich in emulsified fat pulp, tea polyphenol, lactic acid, zinc lactate and other active substances, and the tea feed has the functions of improving immunity and ingestion, promoting digestion, stimulating growth, reducing product cholesterol, improving meat quality of bred animals and the like. The prepared tea feed has the oil oxidization resistance function and can decrease the oil oxidization speed in summer.