Abstract: Abstract: By analyzing and investigating the condition of raft culture working for Patinopecten yessoensis and the harvest mode of artificial raft suspended culture in Dalian Zhangzidao, a new type of high efficiency and energy-saving raft culture working mode and devices for Patinopecten yessoensis were upgraded reconstruction. In order to prove that working mode and device structure are reasonable, comparative tests were executed in the sea area of raft suspended culture in Dalian Zhangzidao.The test was divided into two stages, with test sites in Da Hao island, Da Lian island, Xiao Hao island, and Zhang Zi island. For the phase I test, four trial sites were respectively equipped with three original floating raft culture boats, three floating raft culture boats of first stage reconstruction, and two material transport boats (the length, width and depth of the original floating raft culture boats and first stage reconstruction floating raft culture boats are 8 m, 2.4 m and 0.5 m respectively; the loading capacity is limited in order to meet work requirements with one material transport boat respectively equipped with three floating raft culture boats). Tests were based on actual production situations, and lasted 44 d, working 8 h per day. From November 2nd, to November 23rd, 2011 is the scallop harvest working test. From July 30th, to August 20th, 2012 is the scallop grading working test. For the phase II test, four trial sites were respectively equipped with three floating raft culture boats of second stage reconstruction, three floating raft culture boats of first stage reconstruction, and one material transport boat (the length, width, and depth of the floating raft culture boats of second stage reconstruction are 12 m, 3.3 m, and 0.7 m respectively; the loading capacity meet work requirements, so floating raft culture boats of second stage reconstruction didn't need a material transport boat). The test lasted 44 d, working 8 h per day. From November 1st to November 22nd, 2012 is the scallop harvest working test. From August 1st to August 22nd, 2013 is the scallop grading working test. At the end of testing per day, the amounts of pulling cage and consumption costs of energy were calculated.The results show that the upgraded reconstruction raft culture working boats on the first stage, which consisted of the installed pull stalk rope device, pull cage device, shake cage device, screen device, and toothed pulley slide stalk rope device, relying solely on human work operation mode was changed to mechanical work mode, and the amounts of pulling cage were increased by 56.01% of single-ship per day. Because the installed electric equipments and the rate of the starting diesel engine were declined, energy consumption costs were reduced by 13.95%. The second stage reconstruction raft culture working boats were based on retaining electric equipments and the length, width, and depth were increased from 8 m to 12 m, from 2.4 m to 3.3 m, and from 0.5 m to 0.7 m respectively. The amount of pulling cages were respectively increased by 31.69% and 105% than floating raft culture boats of first stage reconstruction and the original floating raft culture boats. Energy consumption costs of the second reconstruction raft culture working boats are an insignificant difference with the first reconstruction raft culture working boats and reduced by 14.12% of the original floating raft culture boats. The second stage reconstruction raft culture working mode saved 10.8 thousand yuan per year more than the original floating raft culture working mode. In conclusion, the reconstruction raft culture working boat improves working efficiency, and reduces energy consumption. It has a good prospect in application.