The invention provides an anti-interference temperature signal receiver and a signal processing method. The anti-interference temperature signal receiver comprises a digital signal processing chip, a transmitting phase-locked loop local oscillator, a fixed intermediate frequency oscillator, a first mixer, a first band-pass filter, a power amplifier module, a transceiving module, a second band-pass filter, a low noise amplifier, a receiving phase-locked loop local oscillator, a second mixer, a receiving intermediate frequency filter, a second receiving local oscillator, a third mixer and a power circuit. The frequency of a transmitting signal previously sent from the digital signal processing chip to the transmitting phase-locked loop local oscillator is higher than or lower than a reference signal frequency, and the frequency of a first intermediate signal obtained after an intermediate frequency signal generated by the fixed intermediate frequency oscillator and the stable transmitting signal acquired by the transmitting phase-locked loop local oscillator are mixed by the first mixer is consistent with the reference signal frequency, so that the transmitting and receiving synchronism is ensured, meanwhile, the problem of signal interference is further solved, and the measured temperature data is more accurate.