Abstract: It is meaninful to estimate the gravity value in Qomolangma peak.When the wave length for the topographic load λ ≤ 50 km,the crustal strength is strong enough to keep the crust not deformed.Therefore,it is improper to use Airy-Heiskanen or Pratt-Hayford local compensation model to estimate the gravity.On the basis of this idea,utilizing four kinds of formulas,we give the gravity of everest (976970±7)×10^-5m·s^-2.