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In this paper, we calculate the branching ratios and CP-violating asymmetriesfor \bar B^0_s \to f_0(980)K, f_0(1500)K within Perturbative QCD approach basedon k_T factorization. If the mixing angle $\theta$ falls into the range of25^\circ<\theta<40^\circ, the branching ratio of \bar B^0_s\to f_0(980)K is2.0\times 10^{-6}<{\cal B}(\bar B^0_s\to f_0(980)K)<2.6\times 10^{-6}, while$\theta$ lies in the range of 140^\circ<\theta<165^\circ, {\cal B}(\barB^0_s\to f_0(980)K) is about 6.5\times 10^{-7}. As to the decay {\cal B}(\barB^0_s\to f_0(1500)K), when the mixing scheme \mid f_0(1500)>=0.84\mid s\bars>-0.54\mid n\bar n> for f_0(1500) is used, it is difficult to determine whichscenario is more preferable than the other one from the branching ratios forthese two scenarios, because they are both close to 1.0\times10^{-6}. But thereexists large difference in the form factor F^{\bar B_s^0\to f_0(1500)} for twoscenarios.

Study of f_0(980) and f_0(1500) from B_s \to f_0(980)K, f_0(1500)K Decays