Abstract: Described here are the main aspects of a device for processing spiral grove of the welded corrugated tube， including the structure， the working principle， the parameter setting， the characteristics， and the actual operation application effectiveness. The device is capable of solving the problems concerning the mother tube，i.e.， the on-line manufacturing，surface spiral groove processing，and specific length-cutting. Compared with the original operation method，the new one features easy operation，structural simplicity，high efficiency，lower processing time as only 25% of that of the original operation line，lower man power as only 17% of the that of the original operation line，enhancement of productivity per worker as 23 times the original，and tremendous reduction of operation costs and production cycle.