A high-frequency harmonic measurement device based on fundamental frequency prediction comprises a voltage measurement module, a current measurement module, an input filter and a data processor. The voltage measurement module and the current measurement module are respectively connected with the input end of the input filter; the output end of the input filter is connected with the data processor.The current measurement module uses a precise small resistor to replace the existing current clamp to measure the current, and obtains the current data by measuring the resistances at the two ends ofthe precise small resistor. According to the utility model, current data is obtained by collecting the resistance at two ends of the precision small resistor, the data processor adopts harmonic analysis processing based on fundamental frequency prediction and outputs high-frequency harmonic data, and accurate measurement of high-frequency harmonic components can be realized.