The invention discloses an anti-rain-attenuation signal processing system. A defect of the prior art is solved. The system comprises a detection module, a control module, a modulation module, a demodulation module and a safety module, wherein the detection module comprises a water tank and a position sensor; the control module comprises a data unit and a master control unit; and the safety module comprises a self-inspection unit, an alarm unit, a water insulation device and a security control board. By arranging the detection module and the control module, the automatic modulation and demodulation of the electric wave is realized; and meanwhile, the system can safely and efficiently run through the arrangement of the safety module, and the capacity of dealing with the emergency fault is strengthened.