The atomic parameters of the transmition 2s22p6-2s22p53s of Ne-like ions with nuclear charge Z from 13 to 27, including energy level, oscillator strength, spontaneous radiation deay time, level life, electron-collision excitation cross-section, electron-collision excitation rate and so on are obtained by using Hartree-Fock-Roothan (HFR equations). The spectral line enlargement and population inversion formation in Ne-like Ar at 46.9 nm laser transition and the probability of gain generation of other spectral line are discussed with the help of the atomic data. The dependence of oscillator strength on nuclear charge is illustrated. The discharge parameters for Ne-like Ar and Ne-like Kr X-ray laser with capillary discharge are also given based on the obtained atomic parameters. The range of the initial pressure of Ne-like Ar gas is 30～90 Pa and the peak value of the discharge current is 10～50 kA for lasing of Ne-like ions.