In this presentation, we discuss the recent hadronic decays of charmed mesons observed in the BESIII experiment, specifically focusing on the decay processes $D^+ \to K_S^0 \pi^+ \eta$, $D^0 \to \pi^+ \pi^- \eta$, $D^+ \to \pi^+ \pi^0 \eta$, $D_s^+ \to \pi^+ \pi^+ \pi^- \pi^0$, $D_s^+ \to \pi^+ \pi^+ \pi^- \pi^0 \pi^0$, $D_s^+ \to K_S^0 K_L^0 \pi^+$, and $D^+ \to K_S^0 K_S^0 \pi^+$. We present results from amplitude analyses revealing rich structures in these decay processes. Furthermore, we report on the $\phi$ decay ratio in $D_s^{\pm}$ decays. Our findings have significant implications for fundamental inputs related to non-perturbative QCD, hadronic matter structure, and studies of $\mathit{CP}$ violation.