  The 21-cm signal is the most important measurement for us to understand
physics during cosmic dawn. It is the key for us to understand the expansion
history of the Universe and the nature of dark energy. In this paper, we
focused on the characteristic 21-cm power spectrum of a special dynamic dark
energy - the Interacting Chevallier-Polarski-Linder (ICPL) model - and compared
it with those of the $\Lambda$CDM and CPL models. From the expected noise of
HERA, we found more precise experiments in the future can detect the features
of interacting dark energy in the 21-cm power spectra. By studying the
brightness temperature, we found the ICPL model is closer to the observation of
EDGES compared to the $\Lambda$CDM, thus alleviating the tension between theory
and experiments.
