Nowadays the abyssal aquaculture cages are developing rapidly and they are playing an increasingly important role in the sea farming industry in China.
This paper describes the wave forces on columniform-lift offshore cages and gives the kinetic simulation of this kind of cages on the basis of summarizing the actuality of abyssal aquaculture cages in China.
On the basis of Pagrosomus major's biology and behavior characteristic ,a Pagrosomus major grading equipment fitted for deep sea cage was designed and manufactured.
The fast growth of the aquaculture,especially in the cage culture,the deep sea fishing,the modification of the fishing gear & method,the demand of the international market,all these above-mentioned aspects show the new requirements for the quantity,quality,modality,strength of materials and the antipollution and antisepsis capability of the rope net products,also show a higher requirements for the quality,performance and operating stability of the rope net machinery products.