  We present a detailed analysis of the spectral properties of the black hole
transient GRS 1716-249, based on the archival Swift and NuSTAR observations
taken during the outburst of this source in 2016-2017. The first six NuSTAR
observations show that the source is in a canonical hard state, where the
spectrum is dominated by a power-law continuum. The seventh NuSTAR observation
is taken during the intermediate state where both a disc thermal component and
a power-law continuum are shown. All of our observations show a broad emission
line feature in the iron band and a Compton hump above 10 keV. We model the
broad band spectra using a high density disc reflection model, where the soft
X-ray emission in the hard state is interpreted as part of the disc reflection
component. This model enables us to constrain the disc density parameter of GRS
1716-249 in the range of $10^{19}$-$10^{20}$ cm$^{-3}$. We only obtain an upper
limit of the inner disc radius using high density disc reflection spectroscopy
and the results indicate either a non-truncated disc or a slightly truncated
disc with $R_{\rm in}<20r_{\rm g}$.
