Abstract: In order to explore the feasibility of aquaculture of purple sea urchin (Anthocidaris crassispina) in raft, a raft culture experiment of purple sea urchin was carried out in Qida sea area of Lianjiang, Fujian Province from April 2021 to September 2022.In the existing abalone culture sea area, the raft culture facilities were used to feed kelp (Laminaria japonica) and asparagus (Gracilaria lemaneiformis) regularly.After 17 months of breeding, the diameter of the purple sea urchin had reached (47.10 ± 4.07) mm, the body mass had reached (43.40 ± 8.80) g, and the gonadosomatic index was 4.45% ± 2.97 %.The test results showed that it was feasible to use the existing abalone marine raft culture facilities to carry out the marine raft culture of purple sea urchins, but it was necessary to improve the culture facilities according to the characteristics of purple sea urchins such as long thorns.