  In this article, we study the two-body strong decays of the bottom mesons
with the heavy meson effective theory in the leading order approximation, and
obtain all the analytical expressions of the decay widths of the light
pseudoscalar mesons transitions among the S-wave, P-wave and D-wave bottom
mesons. As an application, we tentatively assign the bottom meson $B(5970)$ as
the $2{\rm S}\,1^-$, $1{\rm D}\,1^-$ and $1{\rm D}\,3^-$ states, respectively,
and calculate the decay widths of the $B_1(5721)$, $B_2(5747)$, $B_{s1}(5830)$,
$B_{s2}(5840)$ and $B(5970)$, which can be confronted with the experimental
data in the future.
