  In this article, we tentatively identify the charmed mesons $D_J(2580)$,
$D_J^*(2650)$, $D_J(2740)$, $D^*_J(2760)$, $D_J(3000)$, $D_J^*(3000)$ observed
by the LHCb collaboration according to their spin, parity and masses, then
study their strong decays to the ground state charmed mesons plus light
pseudoscalar mesons with the heavy meson effective theory in the leading order
approximation, and obtain explicit expressions of the decay widths. The ratios
among the decay widths can be used to confirm or reject the assignments of the
newly observed charmed mesons. The strong coupling constants in the decay
widths can be fitted to the experimental data in the future at the LHCb,
BESIII, KEK-B and $\rm{\bar{P}ANDA}$.
