The energy levels of 4s24p, 4s4p2, 4s24d and 4p3 configurations and electric dipole oscillator strengths of 4s24p-4s4p2, 4s24p-4s24d and 4s4p2-4p3 transitions for KrVI ion have been calculated by means of the configuration interaction (CI) theory and the parameter extrapolation method. The calculated wavelengths show a good agreement with observations within 0.7 A range, the lines having the largest oscillator strengths are the ones observed in experimental.