Sounding balloon is made of natural latex as the main raw material, adding appropriate amount of compounding agent. As a vehicle, before use, a certain amount of hydrogen (helium) is filled in the sphere, and the air buoyancy is used to carry a radiosonde to the high altitude to detect weather elements such as wind direction, wind speed, temperature and humidity at different altitudes. It is an indispensable and important tool for the development of meteorological science, aviation and space technology.