  NGC 2617 has attracted a lot of attention after the detection of the changes
in spectral type, and its geometry and kinematics of broad-line region (BLR)
are still ambiguous. In this paper, we present the high cadence ($\sim$ 2 days)
reverberation mapping campaign of NGC 2617 from 2019 October to 2020 May
undertaken at Lijiang 2.4 m telescope. For the first time, the
velocity-resolved reverberation signature of the object was successfully
detected. Both H$\alpha$ and H$\beta$ show an asymmetrical profile with a peak
in the velocity-resolved time lags. For each of both lines, the lag of the line
core is longer than those of the relevant wings, and the peak of the
velocity-resolved lags is slightly blueshifted. These characteristics are not
consistent with the theoretical prediction of the inflow, outflow or Keplerian
disk model. Our observations give the time lags ofH$\alpha$, H$\beta$,
H$\gamma$, and He I, with a ratio of
$\tau_{\rm{H}\alpha}$:$\tau_{\rm{H}\beta}$:$\tau_{\rm{H}\gamma}$:$\tau_{\rm{He~I}}$
= 1.27:1.00:0.89:0.20, which indicates a stratified structure in the BLR of the
object. It is the first time that the lags of H$\alpha$ and He I are obtained.
Assuming a virial factor of $f$ = 5.5 for dispersion width of line, the masses
of black hole derived from H$\alpha$ and H$\beta$ are $\rm{23.8^{+5.4}_{-2.7}}$
and $\rm{21.1^{+3.8}_{-4.4}} \times 10^{6}M_{\odot}$, respectively. Our
observed results indicate the complexity of the BLR of NGC 2617.
