Cantilever crane capable of doing linear work

The invention discloses a cantilever crane capable of doing linear work, and belongs to a cantilever crane applied to engineering machines. The cantilever crane comprises a rocker support, the rockersupport is movably connected with one end of a large arm, the other end of the large end is movably connected with one end of a crank arm, the other end of the crank arm is provided with a swing rotation mechanism, a transverse supporting arm is installed on the swing rotation mechanism, one end of the transverse supporting arm is provided with a longitudinal supporting arm, and an operation device is installed at the lower end of the longitudinal supporting arm; and the cantilever crane capable of doing linear work is provided with four linkage cylinders, and therefore the cantilever crane can achieve larger-angle bending and stretching, the operation area is larger, the operation device at the end of the crank arm can do rectilinear motion, and the cantilever crane can continuously movealong a slope to do equal-