Processing device and processing method of combined pipeline

The invention discloses a processing device of a combined pipeline. The processing device comprises a first coupling machine, a pipe wrench machine, a second coupling machine and a special welding machine system, wherein the first coupling machine, the pipe wrench machine and the second coupling machine are arranged in sequence in a linear array manner, and can slide in the axial direction of thearray, and the special welding machine system is arranged on one side of the linear array and can slide in the axial direction of the array. The invention further discloses a processing method of thecombined pipeline. The processing device included in the processing method carries out the operation of connecting a first flange, a first straight pipe, a first elbow and a second straight pipe in sequence in a combined manner. The processing method comprises the following steps of first, welding the first flange and the first straight pipe; second, welding the first straight pipe and the first elbow; and third, welding t