The invention relates to mixture indicator and an animal indicating method, belongs to an indicating method, and provides mixture indicator and an animal indicating method adopting the mixture indicator. Raw materials of the mixture indicator comprise magnetic particle and edible oil, wherein the magnetic particle at least contains iron and carbon. The mixture indicator is injected into an object to be indicated, a detector determines whether the object is indicated or not, and the indicated object is replaced after the indication is completed. Because the raw materials of the mixture indicator have simple component, stable chemical property, easy obtaining of the raw materials, low cost and easy preparation, the injection quantity of the mixture indicator is little, the indicating speed is very high, and the indicating cost is very low. The invention not only influences the indicated object little, but also has higher safety to a human body, has wide range of application, especially the application to living microbe, such as the cultivation of bionts of rabbit fish, amphioxus, loach, bird, and the like, and can be also used as an indicator of a nonmagnetic product (the product without influencing magnetic lines).