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We present a model-independent determination of the curvature parameter$\Omega_k$ by using the Hubble parameter $H(z)$ and angular diameter distance$D_A(z)$ from the recent baryon acoustic oscillation (BAO) measurements. Each$H(z)$ and $D_A(z)$ pair from a BAO measurement can constrain a curvatureparameter. The accuracy of the curvature measurement improves with increasedredshift of $H(z)$ and $D_A(z)$ data. By using the $H(z)$ and $D_A(z)$ pairderived from BAO Lyman $\alpha$ forest measurement at $z=2.36$, the $\Omega_k$is confined to be -0.05$\pm$0.06, which is consistent with the curvature$-0.037^{+0.044}_{-0.042}$ constrained by the nine-year WMAP data only.Considering future BAO meausurements, at least one order of magnitudeimprovement of this curvature measurement could be expected.

Model-independent determination of curvature parameter by using $H(z)$ and $D_A(z)$ data pair from BAO measurement