By combining the modified HellingerReissner(HR) variational principle for elastic material with the quadratic interpolation functions, the formulation of isoparametric element with 8node for Hamilton canonical equation in the cylindrical coordinate was established in this paper. Firstly, the modified HR variational principle for elastic material was briefly presented. Then the quadratic interpolation functions were used to express the stresses and displacements of shell. The formulation of isoparametric element with 8-node for Hamilton canonical equation in the cylindrical coordinate was derived in detail from the modified H-R variational principle. The results of numerical examples show the correctness of the formulation of isoparametric elements in this paper.