Plant for cold extraction of puree, or juice, from a partly frozen food product of vegetable origin having a predetermined size, said plant comprising: - a treating machine arranged to treat a starting product obtaining a treated product, the treating machine being selected from the group consisting of: - a softening machine arranged to soften the starting food product of vegetable origin through a plurality of pulses in quick succession obtaining a softened product; - a grinding machine arranged to grind said starting food product of vegetable origin; - a chopping machine arranged to chop said starting food product of vegetable origin; - a machine configured to cause the starting product to pass through a sieve; - a machine configured to cut the starting product of vegetable origin; - a cold extraction machine located downstream of said treating machine, in said extraction machine a rotor being arranged configured to work in combination with a sieve having a plurality of holes, in order to separate said treated product into a main product comprising said puree, or juice, which crosses said sieve and is discharged through a first outlet, and into a waste material that, instead, cannot cross said sieve and is discharged through a second outlet; - a division machine (40,) located upstream of said treating machine, in said division machine (40,) a division means (50, 50') being provided configured to divide said food product of vegetable origin at least partly frozen, into a plurality of pieces of predetermined reduced size in such a way that they can be fed to said treating machine; said plant characterized in that a means for loading is, furthermore, provided upstream of said division means and comprising a gripping means arranged to grip a bag, or barrel containing said partly frozen food product of vegetable origin at a time, said means for loading being slidingly mounted on a support structure and arranged to bring each said bag, or barrel, at a time from a gripping height hp to a discharging height hs, with hs>hp, and to tilt each said bag, or barrel at said discharging height hs in such a way to introduce the partly frozen food product of vegetable origin contained in said bag, or barrel, in said division machine through a loading mouth; and in that said division means (47, 48) comprises a division roller housed within a division chamber and arranged to rotate about a rotation axis, said division roller being provided on the outer surface with a plurality of teeth having a curved profile and arranged to penetrate at least partially in said partly frozen food product of predetermined size contained within said division chamber and reaching the division roller from the above and to divide each partly frozen food product of predetermined size into pieces of said predetermined reduced size. - a treating machine arranged to treat a starting product obtaining a treated product, the treating machine being selected from the group consisting of: - a softening machine arranged to soften the starting food product of vegetable origin through a plurality of pulses in quick succession obtaining a softened product; - a grinding machine arranged to grind said starting food product of vegetable origin; - a chopping machine arranged to chop said starting food product of vegetable origin; - a machine configured to cause the starting product to pass through a sieve; - a machine configured to cut the starting product of vegetable origin; - a softening machine arranged to soften the starting food product of vegetable origin through a plurality of pulses in quick succession obtaining a softened product; - a grinding machine arranged to grind said starting food product of vegetable origin; - a chopping machine arranged to chop said starting food product of vegetable origin; - a machine configured to cause the starting product to pass through a sieve; - a machine configured to cut the starting product of vegetable origin; - a cold extraction machine located downstream of said treating machine, in said extraction machine a rotor being arranged configured to work in combination with a sieve having a plurality of holes, in order to separate said treated product into a main product comprising said puree, or juice, which crosses said sieve and is discharged through a first outlet, and into a waste material that, instead, cannot cross said sieve and is discharged through a second outlet; - a division machine (40,) located upstream of said treating machine, in said division machine (40,) a division means (50, 50') being provided configured to divide said food product of vegetable origin at least partly frozen, into a plurality of pieces of predetermined reduced size in such a way that they can be fed to said treating machine;