Underground target identification positioning and imaging method

The invention discloses an underground target identifying, positioning and imaging method, which comprises the following steps of: removing surface reflection waves and antenna coupling waves by using original B scanning echo data and adopting an averaging method; converting the echo image into a binary image by adopting an image processing method; constructing a column segment set from the binary image according to the transmitted waveform pulse width, and denoising the column segment set according to the ricker wave main lobe width to obtain a denoised column segment set; clustering column segment clusters containing hyperbolic labels corresponding to different targets from the column segment set; performing hyperbolic fitting on different target hyperbolic column segment clusters by adopting a limited fitting algorithm; inverting the target position, radius and underground dielectric constant according to the hyperbolic parameters, and clustering according to the similarity of different target feature vect