The accuracy and stability of optical clocks has achieved 10-18 level currently. The progress on the optical lattice clocks of Strontium (Sr) atoms at National Time Service Center is presented. 88Sr，which has the highest natural abundance in four isotopes of Sr, is cooled on the basis of transitions (5s5s)1S0—(5s5p)1P1 and (5s5s)1S0—(5s5p)3P1. In order to cancel the effect of Doppler shift and recoil shift these cold atoms are trapped in the optical lattice. However, the optical lattice where atoms are trapped can make the energy level shift, called A. C. Stark shift. The “magic” wavelength for clock transition (5s5s)1S0—(5s5p)3P0 can make the same Stark light-shift for both of them, being value 813.4 nm. Then those cold 88Sr atoms are confined in a 1-D optical lattice constituted by the laser outputting from an amplified diode laser, operating on the “magic” wavelength 813nm. Consequently, the lifetime of atoms in 1-D optical lattice is measured and the value is 270 ms. The temperature and the number are about 3.5 μK and 1.2×105 respectively. Atoms confined in the optical lattice can provide a long interrogation time for probing the clock transition, furthermore make the foundation for developing the optical lattice clock of Sr atoms.