基于参数微扰法并使用满足空间交换对称性的波函数计算了氦原子的2 到12 级近似基态能量.计算表明，随着近似级数的增加，氦原子基态能量逐渐降低，改变量越来越小，基态能量与实验值的绝对误差存在一定起落.因此，选择合适的近似级数对氦原子基态能量的精确计算具有重要作用.

Combining the parameter perturbation method with the wave functions that obeys space change symmetry， the ground state energy ( GSE) of the helium atom is calculated from the second to the twelfth level approximations. It is found that，with the increase of the level，the ground energy and its change decrease，and the absolute error between the calculated GSE and experiments exists small fluctuation. Therefore，the selection of approximate levels is vitally important for the accurate GSE calculation of the atom.