Considering the $B$ mesonic wave function ${\phi}_{B2}$, the $B$ ${\to}$ $PV$ decays are restudied at the leading order for three scenarios by using the perturbative QCD approach within the standard model, where $P$ $=$ ${\pi}$ and $K$, and $V$ denotes the ground $SU(3)$ vector mesons. It is found that the contributions of ${\phi}_{B2}$ can enhance most of branching ratios, and are helpful to improve the overall consistency of branching ratios between the updated calculations and the available data, although there are still some discrepancies between the experimental and theoretical results. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
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