Atractylodes lancea extract feed additive and preparation method thereof

A method of preparing an Atractylodes Lancea extract feed additive, comprising steps of:

• (1) pretreating and smashing Atractylodes Lancea, immersing the Atractylodes Lancea for 5-6 h after adding ethanol solution, and then ultrasonically extracting at room temperature for 35-50 min through an ultrasonic extractor, and then filtering, and obtaining a filtrate and a first solid residue;
• and then vacuum evaporating for removing ethanol in the filtrate, and finally obtaining a first extracting solution;
• (2) adding eight times an amount of water into the first solid residue, boiling for 4-6 h at a steam pressure of 0.4-0.7 MPa, filtering to obtain a second extracting solution and a second solid residue;
• (3) adding five times an amount of water into the second solid residue, boiling for 1-3 h at a steam pressure of 1.5-1.6 MPa, filtering to obtain a third extracting solution and a third solid residue;
• (4) mixing the first extracting solution, the second extracting solution and the third extracting solution, concentrating for obtaining a first extractum;
• spraying and drying to obtain an Atractylodes Lancea extract dry powder;
• and
• (5) evenly mixing the Atractylodes Lancea extract dry powder with a carrier to obtain the Atractylodes Lancea extract feed additive.