A copper aluminum terminal clamp capable of changing an angle, including a rotating seat, a locking ring, a wiring device, a front key, a rear key and anti-skid lines. The rotary seat includes a circular chassis and a limiter column; the locking ring is provided with a front lock cavity, a front chute, a front compression spring, a front hidden plug and a front apparent plug; the wiring device is provided with a rear lock cavity, a rear compression spring, a rear hidden plug, a rear apparent plug, and a binding terminal; the front key is provided with a front key slot; the rear key is provided with a rear key slot; the front end face of the circular chassis, the front and rear end faces of the locking ring, and the rear end faces of the locking ring are respectively provided with anti-skid lines in the circumferential direction; and the copper aluminum terminal clamp needs to be opened with the front key and the rear key at the same time. The angle adjustment method of the copper aluminum terminal clamp capable of changing the angle comprises the following steps: step 1: connecting the copper wire and the aluminum wire; step 2, loosing a puller bolt; step 3, loosing the locking ring; step 4, adjusting the angle of the wiring device; and step 5, completing the fixation.