Wavelengths and weighted oscillator strengths of transitions between levels up to n=5, 1=4 are calculated for the Li-like ions (Z=13～17, 19). Multi-configuration HXR method and optimization of slater radial integrals are used in the computations. Comparisons with existing experimental results are given. It is found that for the 4f-3d transition the calculated wavelengths are in better agreement with the measured data.