  Bilayer moir\'e structures have attracted significant attention recently due
to their spatially modulated layer degrees of freedom. However, the
layer-dependent transport mechanism in the moir\'e structures is still a
problem to be explored. Here we investigate the layer-dependent transport
properties regulated by the strain, the interlayer bias and the number of
moir\'e periods in a strained moir\'e homobilayer TMDs nanoribbon based on
low-energy efficient models. The charge carriers can pass perfectly through the
scattering region with the moir\'e potential. While, it is noted that the
overall transmission coefficient is mainly contributed from either intralayer
or interlayer transmissions. The transition of transport mechanism between
intralayer and interlayer transmissions can be achieved by adjusting the
strain. The intralayer transmissions are suppressed and one of the interlayer
transmissions can be selected by a vertical external electric field, which can
cause a controllable layer polarization. Moreover, the staggered intralayer and
interlayer minigaps are formed as the number of moir\'e periods increases in
the scattering region due to the overlap of the wave functions in two adjacent
moir\'e periods. Our finding points to an opportunity to realize layer
functionalities by the strain and electric field.
