The invention discloses a device used for electrolyzing and processing a double-faced trumped-shaped hole array in a thin walled cylinder. A tool negative pole is a hollow rotary cylinder which is provided with a liquid inlet hole and a liquid outlet hole. A workpiece positive pole, an axis and an non-contact ground sleeve are arranged on the outside of the tool negative pole. Two ends of a ringlike cavity formed between the tool negative pole and the workpiece positive pole are in motive seal through electric insulation motive seal pieces. Two ends of the tool negative pole are respectively connected with an electrolyte circulating filtration unit. A positive pole and a negative pole of an electrochemical machining power supply are respectively connected with the workpiece positive pole and the tool negative pole. Two carrier rollers which are parallelly arranged below the workpiece positive pole are in line contact with the workpiece positive pole. The carrier rollers are driven by a power source unit. Two parallel carrier rollers are used for supporting and locating the large draw ratio thin walled cylinder stably and reliably, workpieces have small deformation, the workpiece positive pole is in a rotary state in the process of processing, electrolytes in a small hole of the workpiece positive pole can drop automatically under the effect of gravity, thus benefiting removal of electrolysates in a blind hole and update of the electrolytes in the small hole.