Abstract: The energy level splitting and degeneracy in the first order Stark effect of hydrogen atom can quickly be obtained in a table,and the results are in agreement with the ones from the theoretical calculations. Based on the results of the first order Stark effect of hydrogen atom in the parabolic coordinate, it is proved that the space of two adjacent levels fulfill the relation 1.5neεa.

Key words: Hydrogen atom, Stark effect, energy level splitting, degeneracy, table