Meteorological monitoring element mounting arm and meteorological tower

The meteorological monitoring element installation arm comprises an iron tower body, the iron tower body comprises three stand columns arranged in a regular triangular prism shape and multiple layers of observation platforms, the observation platforms are in a regular triangular shape, and walking inclined ladders are arranged between the upper observation platform and the lower observation platform and between the lowest observation platform and the ground. A meteorological monitoring element mounting arm is arranged at each layer of observation platform; the meteorological monitoring element mounting arm comprises a rotating arm, cable-stayed steel cables connected to the left side and the right side of the rotating arm and a clamping device, one end of the rotating arm is rotationally connected with the stand column, and a meteorological sensor is mounted on the rotating arm; the clamping device is installed on the stand column, one end of the cable-stayed steel cable is connected with the rotating arm, an