  In our work, we study the evolution of primordial black holes within the
context of Brans-Dicke theory by assuming present universe as vacuum dominated.
We also consider the accretion of radiation, matter and vacuum energy only
during respective dominant periods. From our study, we found that the accretion
rate is slower in both radiation and vacuum energy dominated eras in
Brans-Dicke theory in comparision with General Theory of Relativity. Thus the
PBHs evaporate at a faster rate in Brans-Dicke theory than Standard Cosmology,
if we consider the presence of vacuum energy in both cases. We also find that
vacuum energy accretion efficiency should be less than 0.61.
