  We present a practical entanglement classification scheme for pure state in
form of $2\times L\times M\times N$ under the stochastic local operation and
classical communication (SLOCC), where every inequivalent class of the
entangled quantum states may be sorted out according to its standard form and
the corresponding transformation matrix. This provides a practical method for
determining the interconverting matrix between two SLOCC equivalent entangled
states, and classification examples for some $2\times 4\times M\times N$
systems are also presented.
