Abstract: Affected by complex electromagnetic environments and multipath effects, the nonlinear characteristics of radio receiver mixers are significantly enhanced, generating a large amount of harmonic and intermodulation interference, which seriously affects the purity and system stability of the received signal. To this end, research is being conducted on current harmonic suppression methods for wireless receiver mixers. Firstly, the harmonic current extraction of the radio receiver mixer is completed through synchronous rotation coordinate transformation, obtaining the 5th and 7th harmonic current components. Then, an equivalent impedance model of the radio receiver mixer is established to calculate the feedforward compensation voltage. Finally, adaptive filtering technology is introduced to dynamically and timely adjust the compensation voltage, effectively suppressing the current harmonics introduced by the mixer. Comparative experiments have shown that this method is more effective in suppressing low order harmonic interference compared to existing suppression methods, significantly improving dynamic response speed and steady-state accuracy, while reducing harmonic losses, providing an effective solution for harmonic control of high-precision radio receivers.