Binocular stereomicroscope, also known as solid microscope, can produce upright three-dimensional spatial images when observing objects. The binocular stereo microscope has a strong sense of three dimensionality, clear and wide imaging, and a long working distance. Different reflected and transmitted light illumination can be selected according to the characteristics of the observed object, making it a widely applicable conventional microscope. The binocular stereo microscope has reliable performance, simple operation, convenient use, and beautiful appearance. It can not only be used for teaching demonstrations, biological anatomy, observation and analysis, but also for electronic and precision machinery industry parts assembly and inspection, as well as seed inspection in agriculture due to its high resolution and large field of view clarity.