Abstract: The influence of different material plastic plates(DMPP), including high density polyethylene(HDPE), low density polyethylene(LDPE), polyvinyl chloride(PVC), polystyrene(PS), polyethylene terephthalate(PET), and polyurethane(PUR), and the relationship between the roughness of plates and the settlement rates on the settlement of the larval moon jellyfish Aurelia sp.1 were investigated in situ. As result, it showed firstly that polyps of Aurelia sp.1 found on the DMPP during the early autumn indicates that the increasing artificial structures in coastal waters might have provided much suitable habitats for the settlement and proliferation of polyps. Secondly, the larvae showed a clear settling selection on the DMPP. The settlement rates of larvae were higher in the plastic plates made of PET, PUR and PVC than other three materials. The settlement rate of larvae was the highest in plastic plates made of PUR (3.21 ± 0.74 ind./cm²), while the lowest in plastic plates made of HDPE (0.26 ± 0.08 ind./cm²). Thirdly, the settlement rate of larvae was not significant related to the roughness value (Ra) of the materials. Therefore, the surface roughness of a material is not the key factor influencing the settlement rate of the larvae. The difference in biofilm formed on the plastic plate may also influence the settlement of larvae. These findings may provide important information on the causes and control of moon jellyfish blooms in coastal waters of China.