Abstract: In astrophysics, plasma, quantum chemistry and advanced technique, an increasing demand for collision data is evident. Among those data,cross section of electron impact excitation is important and fundamental data. In this paper, we present the electron impact excitation cross section for some ions at high-energy incident electron. In our calculation, the LS coupling antisymmetric single configuration wavefuction of the target has been used. The plane wave BORN approximation has been used in treating the collision problem. Angular part of the transition matrix element of complex atom is treated carefully. We have computed single electron radial wavefunction of atom by means of HARTREE-FOCK-SLATER self consis-tent field method. We call our computer program as PBA(9). By thiscomputer progrom, we can compute excitation cross sections, collision strengths, generalized oscillator strengths and optical dipole oscillator strengths. In fact, we have computed widely from H-like to Ne-like iso-electronic sequences. It is made to compare our results with the other ones available. It shows that our results are satisfying for high energy electron. For example, the values of the excitation cross section for C and O fall into the accurate region of recommend data given by Japan's center NAGOYA of atamic data. We conclude that the method used in this paper is reliable and the results are correct. It can provide us with electron-impact excitation useful informantion of light atoms (ions)by high energy electron.