High-precision rainfall detection method and device for water conservancy and hydropower

The invention relates to a high-precision rainfall detection method and device for water conservancy and hydropower, and discloses a high-precision rainfall detection device which measures underwater pressure in real time through an arranged pressure sensor and can be flexibly retracted and released through an arranged electric turbine and a connecting rope. Which comprises a main body supporting barrel, a supporting assembly, a descending assembly and a recycling assembly, and is characterized in that the main body supporting barrel is of a cylindrical structure, the supporting assembly is arranged at one end of the main body supporting barrel, the descending assembly is arranged in the main body supporting barrel, the recycling assembly is arranged at the other end of the main body supporting barrel, and a battery is arranged in the main body supporting barrel; the battery is located at the two-thirds position of the main body supporting cylinder, one end of the main body supporting cylinder is provided wit