Compact multi-function device composed of a lifting central body (platform) supporting on its sides two side frame members which can be widened/narrowed if needed even when in operation. The side frame members are equipped with several motorized operating units arranged in sequence and suitable to carry out all or part of the operations related to cleaning, weeding, fertilization, soil ploughing in and hoeing on ground strips at the foot of plant rows, particularly vineyards, as well as possible defence operations. The device can be fitted to the lifting groups of tractors driven by operators or of other self-moving vehicles, even with robotized drive, working on the two sides while moving through the plant row. The operating units are driven by motors even of different type, such as oleo-dynamic and/or electric motors. The correct way to be followed by the vehicle is determined by the operator or, in case of more advanced solutions, is controlled automatically thanks to remote controlled or self-driven ways. The positioning of the side frame members is automatic, assured by plant row trunks proximity detectors.