An automatically moving garden trimmer, comprising a power engine (1) and trimming devices (18)； the power engine (1) is rotatably connected to a rotary disc base (2) which is driven by a power device to rotate in a horizontal manner, a lower support arm (3) and a base cylinder (4) for driving the lower support arm (3) to swing are hinged on the rotary disc base (2), at least two outward-extending support arms (5) and an extension cylinder (6) for driving the outward-extending support arms (5) to swing and adjusting an outward-extending distance are hinged on an end of the lower support arm (3), and a ball (19) is connected to a connecting base (7)； the two trimming devices (18) are provided on side faces of the ball (19), each of the trimming devices (18) comprising a spiral device (20) and a trimming ring (29), the spiral device (20) comprising a spiral support (21), and the spiral support (21) being provided with a sleeve (22). Rotating blades (33) of the trimming devices (18) can be replaced, and an operator can select suitable blades for operation according to the differences in shapes and sizes of branches to be trimmed, such that the device has a wide application range； once a blade is damaged, it can be replaced with a new blade, saving maintenance time, and improving the working efficiency.La présente invention concerne un taille-haie à déplacement automatique qui comporte un moteur électrique (1) et des dispositifs de coupe (18) ； le moteur électrique (1) est relié rotatif à une base de disque rotatif (2) qui est entraînée par un dispositif d'alimentation afin de tourner de manière horizontale, un bras de support inférieur (3) et un cylindre de base (4) afin d'entraîner le bras de support inférieur (3) en oscillation sont articulés sur la base de disque rotatif (2), au moins deux bras de support s'étendant vers l'extérieur (5) et un cylindre d'extension (6) devant entraîner les bras de support s'étendant vers l'extérieur (5) en oscillation et régler une di
