In this paper, we study several properties of an orthonormal basis $\{N_{n}(z)\}$
{
N
n
(
z
)
}
for the Newton space $N^{2}({\mathbb{P}})$
N
2
(
P
)
. In particular, we investigate the product of $N_{m}$
N
m
and $N_{m}$
N
m
and the orthogonal projection P of $\overline{N_{n}}N_{m}$
N
n
‾
N
m
that maps from $L^{2}(\mathbb{P})$
L
2
(
P
)
onto $N^{2}(\mathbb{P})$
N
2
(
P
)
. Moreover, we find the matrix representation of Toeplitz operators with respect to such an orthonormal basis on the Newton space $N^{2}({\mathbb{P}})$
N
2
(
P
)
.