This paper designs a new integrated structure of limiting and filtering that works in the 5G mobile communication frequency band, which is suitable for RF front-end and has good point-to-point protection. By integrating the two modules of limiting and filtering, the structure avoids the construction of a matching network between the modules and reduces the circuit volume. Compared with the traditional ferrite frequency selective limiter, the structure achieves the characteristics of wide span and high power capacity in the target frequency band. The test results show that: in the 2.55-2.65GHz frequency band, the insertion loss of the structure is less than 1.8dB, and the clipping level is about 7.5dBm; in the 4.8-4.9GHz frequency band, the insertion loss of the structure is less than 2dB, and the clipping level is less than 2dB. About 2.5dBm. Outside the selected frequency band, the leakage power is attenuated to be negligible. Therefore, the structure designed in this paper can effectively improve the sensitivity of the RF front-end receiver while protecting the sensitive components.