Numerous indirect evidences from
astronomy and cosmology suggest the existence of dark matter in the universe. Its existence provides a strong hint that there may be a dark sector, consisting of
particles that do not interact with the known strong, weak, or electromagnetic force. Intriguingly, this dark sector might weakly couple to the Standard Model through a portal interaction linking gauge invariant SM operators to a mediator. The BESIII experiment has collected the largest data samples at the $J/\psi$ and $\psi$(3686) resonances in the world, which provides a clean reaction environment to search for dark sector particles characterized by invisible energy.
This proceeding summarizes the recent results in the search of axion-like particles, muonphilic scalar $X_0$ and vector $X_1$, and a massive dark photon published by the BESIII Collaboration.