In static gas target, the 5th -17th (40-160 nm) high harmonic generation soft X-ray laser radiation has been obtained using linearly-polarized Ti: sapphire ultra-short laser pulses( central wavelength is 795 nm, pulse duration is 105 fs, repetition rate is 10 Hz and one pulse energy is 50 mj) . The change of high harmonic spectra intensities vs input laser power is especially observed. Because the incident laser intensities verge on or even exceed the saturation intensities in this experiment, the high-order harmonic intensities begin to decrease after increase with incident laser power increase, and the ion spectra of gas have been observed in the same time, which verify the conversion relationship between the high harmonic generation and ion spectra radiation.