The invention discloses a weibull clutter sequence generating device and method. The generating device comprises a random sequence generator, a Gaussian sequence conversion device, a frequency domain correlated characteristic function conversion device and a zero-memory non-linear transformation device; the random sequence generator is used for generating a random sequence; the Gaussian sequence conversion device is connected with the random sequence generator and used for converting a random sequence into a Gaussian random sequence meeting the preset precision requirement; the frequency domain correlated characteristic function conversion device is connected with the Gaussian sequence conversion device and used for generating a first Gaussian random sequence by loading preset frequency domain characteristics into the Gaussian random sequence, wherein the first Gaussian random sequence has the preset frequency domain characteristics; the zero-memory non-linear transformation device is connected with the frequency domain correlated characteristic function conversion device and used for carrying out non-linear transformation on the first Gaussian random sequence based on preset parameter values to generate a time correlated weibull clutter sequence with the preset parameter values.