Radio frequency front-end low-noise amplifier protection device

The invention discloses a radio frequency front-end low-noise amplifier protection device, and belongs to the technical field of electronic information. The device comprises a low-noise amplifier, a current-limiting protection circuit and a power supply which are electrically connected in sequence, wherein the current-limiting protection circuit comprises a field effect transistor, a sampling resistor, a current sampling circuit and a voltage comparison circuit; one end of the sampling resistor is connected with a power supply end of the low-noise amplifier, the other end of the sampling resistor is connected with a drain end of the field-effect tube, the current sampling circuit is connected in parallel with two ends of the sampling resistor, an output end of the current sampling circuit is connected with an input end of the voltage comparison circuit, and an output end of the voltage comparison circuit is connected with a grid end of the field-effect tube. The source end of the field effect transistor is co