  Study of polarization of heavy particles is an important branch of research
in today's collider studies. The massive $W$ boson has two types of
polarization states, which usually are studied via the angular distribution of
its decay products. We have studied polarization of hadronic and boosted $W$
boson using jet substructure technique at 14 TeV LHC. Two different methods,
viz. N-subjettiness and Soft Drop, were used to find the subjets, which are
approximately considered to be the two hadronic decay products of $W$, inside
boosted $W$ jets. These subjets were then used to find the distribution of
$p_\theta$ and $z_j$ to prepare the templates of longitudinally and
transversely polarized $W$. We then used these templates to find the fractions
of different $W$ polarization in a mixed sample to a relatively good accuracy.
