Biological microscope is a kind of precise optical instrument used to observe biological slices, biological cells, bacteria and living tissue culture, fluid precipitation, and other transparent or translucent objects, powders, fine particles and other objects. The biomicroscope is used for the observation of microorganisms, cells, bacteria, tissue culture, suspension, sediment, etc. in medical and health institutions, colleges and universities, and research institutes. It can continuously observe the reproduction and division process of cells and bacteria in the culture medium. It is widely used in cytology, parasitology, oncology, immunology, genetic engineering, industrial microbiology, botany and other fields.