The invention relates to a display method of a three-dimensional image, wherein the display method adopts data of a multi-arm caliper imaging logging instrument and a magnetic wall thickness logging instrument on the basis of an irregular space quadrangle. The display method of the three-dimensional image comprises the steps that data loading is conducted, specifically, the logging data obtained by the logging instruments are loaded; a space irregular quadrilateral grid is established, specifically, the space irregular quadrilateral grid is established according to the logging data loaded in the data loading step; and space irregular quadrilateral grid loading is conducted, specifically, the space irregular quadrilateral grid is loaded. The space irregular quadrangle is established for thedata of the multi-arm caliper imaging logging instrument and the magnetic wall thickness logging instrument, by combining a depth dimension longitudinal interpolation and a circumferential cubic spline combined interpolation method on the basis of the cosine function and the dirichlet boundary condition, the three-dimensional figure of the data of the multi-arm caliper imaging logging instrumentand the magnetic wall thickness logging instrument is built, the damage and corrosion satiations of oil tubes or sleeves in shafts can be intuitively displayed, and compared with other three-dimensional modeling technologies, the display method is quick and accurate.