Abstract: This article introduced the nondestructine teting(NDT) technologies of coiled tubing in domestic and overseas, and introduces the elements, actualities and disadvantages of electromagnetism and ultrasonic inspection technologies in detail. The elements about three kinds of in-service inspecting equipments in abroad were analyzed such as CT DOG, CT Scope and Argus. The problems of coiled tubing NDT were proposed after combining with the problems exposed in practical inspecting. At last, the technologies and problems were analyzed so that the developing destination of coiled tubing NDT was made, intelligent and integration.