  In this paper, we present explicit actions of braid group on the universal
enveloping superalgebra ${\boldsymbol U}(\mathfrak{{q}}_n)$ and the quantum
queer superalgebra ${\boldsymbol U}_{\!{v}}(\mathfrak{{q}}_{n})$. Then we
provide a new definition of root vectors and some explicit expression for them.
With these procedures, we obtain the PBW-type basis containing the product of
root vectors.
