Disclosed is a functional type feed produced by residues of medicinal plants and a preparing method thereof, and the feed includes the following components, by weight, 2.0%-20.0% of eucommia ulmoides leaves, 2.0%-10% of eucommia ulmoides seed meal, 3.0%-15.0% of purple perilla seed meal, 2.0%-20.0% of honeysuckle straws, 1%-10%of folium leaves, 30%-45% of corn, 5.0%-10.0% of wheat bran, 3.0%-15.0% of soybean meal, 1.0%-5.0% of fish meal, 2.0%-10.0% of bone meal and 1.0%-8.0% of shells. The preparing method includes collecting raw materials of the functional type feed; drying the raw materialsin the sun or drying the raw materials at the temperature between 25DEG C and 60 DEG C until moisture content reaches 8.5 % to 13.5%, and smashing the raw materials to be particles of 0.05 millimeters to 0.5 millimeters; putting the smashed raw materials into a granulator and preparing the functional type feed. According to the functional type feed produced by residues of medicinal plants and thepreparing method thereof, the immunity of livestock is remarkably improved.