By means of extended average level model of relativistio multieonfiguration Dirac-Fock (MCDF-EAL) code, we have calculated fine-structure energy levels of 2s22p5,232p6, 2s22p43s, 2s22p43p configurations and some transition wavelengths of 3s-3p for F-like ions of 21≤Z≤26, which may be the condidates for lasing action. Some energy levels of 3p configuration and transition wavelengths of 3s-3p are predicted.