  We propose a unified scaling theory of entanglement entropy in the
confinements of finite bond dimensions, dynamics and system sizes. Within the
theory, the finite-entanglement scaling introduced recently is generalized to
the dynamics subjected to a linear driving along with a finite system size.
Competition among the three scales as well as the correlation length of the
system is analysed in details. Interesting regimes and their complicated
crossovers together with their characteristics follow naturally. The theory is
verified with the one-dimensional transverse-field Ising model under a linear
driving.
