  We calculate the nuclear enhancement in Drell-Yan transverse momentum
distribution in hadron-nucleus collisions. In terms of multiple scattering
picture, we compute the contributions from double scattering. Applying the
generalized factorization theorem, we express the nuclear enhancement in terms
of twist-4 nuclear parton correlation functions. We demonstrate that these
twist-4 nuclear parton correlation functions are universal, and are the same as
those used to explain the nuclear dependence in di-jet momentum imbalance and
in direct photon production. Using the known information on the twist-4 parton
correlation functions, we estimate the nuclear enhancement for Drell-Yan pair
in large $q_T$ region. We also discuss the source of nuclear suppression in
small $q_T$ region.
