Abstract: It is often necessary to remove the weld surface coating to ensure the accuracy of detection during the operation of the ship, which is cumbersome and low detection efficiency. Moreover, the anti-corrosion effect of the recoating after detection is inevitably affected. This paper takes 20 carbon steel weld as the research object, designes and processes manual defects according to ASME standards, and carries out array eddy current detection tests with or without analogue coating. The experimental research has shown that array eddy current testing technology can meet the surface testing requirements of ship carbon steel weld, especially has obvious advantages in terms of testing efficiency and signal display.