  It was proved by Gromov-Lawson\cite{gl83} that complete three manifold with
positive scalar curvature bounded below has finite Urysohn 1-width only depends
on the uniform positive scalar curvature bounds. It is natural to ask the same
question for the four manifolds. In this paper, we can show that closed four
and five manifolds with positive biRicci curvature has finite Urysohn 1-width
only depends on the curvature bounds. During the proof we can also observe that
the fundamental group of those manifolds are virtually free. This gives a quick
application that $T^{2}\times S^{2}$ can't admit positive biRicci curvature.
