The invention provides a method of using FPGA to realize stolt interpolation. The method comprises the following steps of S1, calculating a frequency coordinate needed by stolt interpolation realization based on a system parameter; S2, according to a stolt mapping relationship, converting the frequency coordinate under a known frequency coordinate, and acquiring a frequency coordinate to be interpolated; S3, obtaining the position of a data point used for interpolation according to the frequency coordinate, calculating a sinc function value according to the position of the data point and extracting corresponding radar data; and S4, carrying out interpolation based on the sinc function value and the radar data and outputting an interpolated data group frame. The invention also provides a FPGA system used for realizing the stolt interpolation. In the invention, through the FPGA, the accurate stolt interpolation is realized and a system complexity is reduced.