The invention belongs to the technical field of metal fitting pressing connection devices and particularly relates to a double arm opposite arrangement assisting multi-angle synchronous pressing device and method. The device comprises opposite arrangement assisting driving wheels, opposite arrangement assisting transmission arms, pressing mold fixing tables and pressing molds, wherein the oppositearrangement assisting driving wheels, the opposite arrangement assisting transmission arms, the pressing mold fixing tables and the pressing molds are symmetrically distributed about the same symmetry center; the two annular opposite arrangement assisting driving wheels are arranged collinearly side by side according to the symmetry center; the inner side of each opposite arrangement assisting driving wheels is uniformly provided with transmission arm fixing tables in the circumferential direction, and is rotationally connected with one end of the corresponding opposite arrangement assistingtransmission arms through the corresponding transmission arm fixing tables; and the other ends of every two opposite opposite-arrangement assisting transmission arms connected with every two oppositearrangement assisting driving wheels are rotationally connected with the same pressing mold fixing table. According to the method, the opposite arrangement assisting driving wheels are used for driving the plurality of pressing molds to synchronously move to the symmetry center to press to-be-pressed workpieces. The double arm opposite arrangement assisting multi-angle synchronous pressing deviceis high in transmission converting efficiency, higher in reliability, capable of achieving large pressing force machining and higher in machining capacity.