  The $x$-dependence of light-cone distribution amplitude (LCDA) can be
directly calculated from a quasi distribution amplitude (DA) in lattice QCD
within the framework of large-momentum effective theory (LaMET). In this paper,
we study the one-loop renormalization of the quasi-DA in the
regularization-independent momentum subtraction (RI/MOM) scheme. The
renormalization factor for the quasi parton distribution function can be used
to renormalize the quasi-DA provided that they are implemented on lattice and
in perturbation theory in the same manner. We derive the one-loop matching
coefficient that matches quasi-DA in the RI/MOM scheme onto LCDA in the
$\overline{\rm MS}$ scheme. Our result provides the crucial step to extract the
LCDAs from lattice matrix elements of quasi-DAs.
