Abstract: The invention concerns a device for pruning and shredding plants. It comprises a shredding head (1) arranged at the end of a steerable arm itself borne by a tractor machine adapted to move along the plants to be treated, the head comprising a housing (10) including two parallel end plates (11, 12) between which are mounted two juxtaposed rotors (13, 14) with parallel axes, equipped with radial blades (15) and adapted to be driven in rotation in opposite directions (F, R), such that the blades (15) of said rotors (13, 14) move in the space (16) which separates said rotors (13, 14) and drive therein the plants to be cut and shredded.