Abstract：In order to reasonably compute the bulk-solid lateral pressure，the pressures predicted by Rankine and Coulomb formulae are compared with those by experiments，the formulae of the Appendix C of Code for Design of Reinforced Concrete Silos(GB50077–2003) are analyzed and verified；and a formula of lateral pressure acting on the wall of large squat silos is obtained based on the static equilibrium method. The results indicate that the pressures predicted by Rankine and Coulomb formulae are larger than the actual values；the formulae of the current code Appendix C need to be supplemented in application process；and the formula based on the static equilibrium method is succinct and the predicted pressures agree well with the actual values and the finite element method results.
