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The Boundary Layer Wind Profile Radar (WPR) provides vertical, continuous, and high spatial/temporal resolution detection data for weather forecasting services. Because the frequent burning of limiters during operation in centralized radar stations across China, an Lband highpower passive limiter is designed, which introduces dualcoupling cables and a power resistor at the front part of the circuit, divided into two limits and increased heat dissipation, to theoretically reduce the power by half through the PIN diode; the multistage diodes are in parallel at the back end, and the limiting process is gradual. The limiter is characterized by high withstand power, low limiting level and low insertion loss. Using ADS software for simulation, the limiter is tested, and the results meet the requirements of design. Application of this limiter in the boundary layer WPR greatly improves radar stability.