A line for producing metal profiles for plasterboard false ceilings has in sequence, along a profile advancement direction, a profiling machine, a cutting group, a punching group, a system for extracting finished metal profiles from the punching group, and a management and control unit. The punching group has a first punching press of the portal type having a first punching head elongated along a first operating direction, and a second punching press of the portal type having a second punching head elongated along a second operating direction, parallel to the first operating direction and staggered with respect thereto along the profile advancement direction. The first punching head is longer than the second punching head. The management and control unit is configured to alternately operate in use the first or second punching press as a function of type or length of the metal profiles in output from the cutting group.