The study of laser rust removal technology for shipping blocks is conducted to meet the technological requirements of green shipbuilding technology development for shipping blocks cleaning and rust removal. The 100w fiber laser is applied on laser rust removal test for shipping blocks with different surface conditions. In terms of surface treatment effect, operating environment, operating efficiency as well as investment and operating cost, this paper compares this fiber laser with the traditional sand blasting rust removal and analyses the effect and applicability of laser rust removal. The results show that laser rust removal technology in application has the advantages of low energy consumption, less pollution and good working environment. The research direction of laser rust removal technology applied to shipping blocks is correct, which provides a new method for shipping blocks rust removal.