The invention provides a radio frequency power signal sampling and amplifying circuit, comprising a detection circuit, a compensation circuit and an amplification circuit, wherein the detection circuit comprises a detection network composed of a Schottky diode and a capacitor and a coefficient regulation circuit composed of resistors, a conduction network is formed by connecting one resistor at the positive end of the Schottky diode with high voltage and connecting one resistor at the negative end with low voltage, so that the radio frequency signal can pass through the detection diode to enter the same phase end of an operational amplifier of the compensation circuit; and the compensation circuit is characterized in that a linear negative feedback loop is provided with three Schottky diodes, the positive ends of the three Schottky diodes are grounded, junction resistor at the negative ends are connected with the reverse end of the operational amplifier of the compensation circuit, the junction resistor are connected with a pair of Schottky diode and the output end of the operational amplifier of the compensation circuit. The radio frequency power signal sampling and amplifying circuit also comprises a plurality of filter capacitors which are distributed from small to large according to the flow direction of the signal and filter the high frequency and low frequency of the radio frequency power signal.