  A real polynomial $f$ is called local nonnegative at a point $p$, if it is
nonnegative in a neighbourhood of $p$. In this paper, a sufficient condition
for determining this property is constructed. Newton's principal part of $f$
(denoted as $f_N$) plays a key role in this process. We proved that if every
$F$-face, $(f_N)_F$, of $f_N$ is strictly positive over $(\mathbb{R}\setminus
0)^n$, then $f$ is local nonnegative at the origin $O$.
