The invention provides a combined type ear thermometer protective bush and a manufacturing method thereof. The combined type ear thermometer protective bush is used for sleeving on a temperature measuring head of the ear thermometer, and the bottom of the temperature measuring head is provided with a combined device. The combined type ear thermometer protective bush consists of a main body of a hollow structure and a base, wherein the main body is provided with an open end and a close end which is opposite to the opening end; and the hollow structure of which the diameter is gradually reduced is formed between the opening end and the close end.