The invention discloses a method for establishing an engineering gravity ellipsoid. The method includes the steps: determining the reference level elevation H0 of the engineering gravity ellipsoid andthe normal gravity value gamma e of the equatorial plane of the engineering gravity ellipsoid; and carrying out precise leveling in areas with high altitude and abnormally large space gravity; usingthe engineering gravity ellipsoid parameters to carry out leveling surface non-parallel correction calculation, wherein the absolute value of the correction value is much smaller than the magnitude ofthe correction value adopting a global gravity ellipsoid; only correction calculation is carried out in elevation control measurement, and correction calculation is not needed in construction measurement; and meanwhile, the problem that the height differences measured by different level routes are unequal is solved, so that the height difference correction calculation work in the construction period is greatly simplified, and the habit of not carrying out correction calculation in construction measurement is kept, and construction measurement is facilitated.