Charmonia are located in the transition region of perturbative and non-perturbative QCD, playing an important role in understanding
the strong interaction. The BESIII experiment has accumulated the world largest $J/\psi$ and $\psi(3686)$ sample with precise center-of-mass energies, which provides unique opportunity to study the charmonium decay with the highest precision. And the scan data from 4.0 GeV to 5.0 GeV can be used to study exotic state. In this contribution, we feature the recent measurement results of charmonium decay at the BESIII experiment, including three first-time observations: $\psi(3686)\to\Omega^-K^+\bar\Xi^0+c.c., \eta_c(2S)\to\pi^+\pi^- K_s K^\pm \pi^\mp$ and $\chi_{cJ}\to3(K^+K^-)$. Additionally, an updated measurement of the M1 transition $\psi(3686)\to\gamma\eta_c(2S)$ with $\eta_c(2S)\to K\bar{K}\pi$ will be discussed. In the search for $\eta_c(2S)\to\pi^+\pi^-\eta_c$, $\chi_{c1}(3872)\to\pi^+\pi^-\chi_{c1}$ and $\chi_{c1}(3872)\to\pi^+\pi^-\eta$, no significant signal was found, leading to the provision of an upper limit.