  In the present work, it is intended to calculate the unintegrated parton
distribution functions (UPDFs) of the $^6{Li}$ nucleus, which depend not only
on the longitudinal momentum fraction $x$ (the Bjorken variable) and the
factorization scale $\mu$ of partons, but also on their transverse momentum
($k_t$). Therefore, the KMR and MRW procedures are applied to generate the
$k_t$-dependent parton distributions from the familiar integrated parton
densities (PDFs), which were determined in our recent related work, using the
constituent quark exchange model (CQEM) for the $^6Li$ nucleus. Then, the
resulting UPDFs of $^6{Li}$ are compared with the UPDFs of free proton from our
previous work. Afterwards, from the $k_t$-factorization formalism, the
structure function (SF) of $^6{Li}$ nucleus is computed to extract its European
Muon Collaboration (EMC) ratio. The results are compered with those generated
from the $^6Li$ nucleus PDFs and the available NMC experimental data. It is
observed that, especially in the small $x$ region, where the $k_t$ dependence
of partons are important in the calculations of the hadron structure functions,
the present EMC ratios are extremely improved compared with those of our
previous work, and show an excellent agreement with the NMC experimental data.
