  The high-precision measurement of Higgs boson properties is one of the
primary goals of the Circular Electron Positron Collider (CEPC). The
measurements of $H\to b\bar{b}/c\bar{c}/gg$ decay branching fraction in the
CEPC experiment is presented, considering a scenario of analysing 5000
$\mathrm{fb}^{-1}$ $e^{+}e^{-}$ collision data with the center-of-mass energy
of 250 GeV. In this study the Higgs bosons are produced in association with a
pair of leptons, dominantly mediated by the $ZH$ production process. The
statistical uncertainty of the signal cross section is estimated to be about 1
% in the $H\to b\bar{b}$ final state, and approximately 5 % - 10 % in the $H\to
c\bar{c}/gg$ final states. In addition, the main sources of the systematic
uncertainties and their impacts to the measurements of branching fractions are
discussed. This study demonstrates the potential of precise measurement of the
hadronic final states of the Higgs boson decay at the CEPC, and will provide
key information to understand the Yukawa couplings between the Higgs boson and
quarks, which are predicted to be the origin of quarks' masses in the Standard
Model.
