网箱养殖是中国渔业养殖中重要组成部分，针对网箱养殖大型化、规模化发展需求，基于正压气力输送技术设计了网箱养殖远程自动投饲系统。系统以浮式养殖管理平台为载体，由供料装置、饲料输送和投喂装置以及自动控制装置等组成。重点介绍了投饲系统的主要结构和工作原理，对投饲系统主要参数进行了分析设计。控制部分以PLC为控制核心，根据输送压力变频控制螺旋输料机下料量，自动化集中控制。开展了系统性能试验，对粒径分别为6 mm、8 mm、10 mm的饲料投饲量和破碎率进行测试和分析。结果显示，最小投饲量平均为523.2 kg/h，符合设计要求，最大破碎率为1.12%，在相同输送距离条件下，粒径越大，投饲效率越低，破碎率越大。研究表明，通过投饲系统与养殖管理平台功能集成，可以进一步提高自动投饲系统适用性。

Cage culture is an important part of aquiculture in China. In view of the large-scale development of cage culture, a remote automatic feeding system for cage culture was designed based on the positive pressure pneumatic conveying technology. The feeding system is installed on the floating culture management platform and consists of loading device, conveying and feeding device and automatic control device. The main structure and working principle of the feeding system were introduced, and the main parameters were analyzed and designed. PLC, the core of the control system, controls the feeding amount of screw feeder by frequency in an automatic and centralized manner according to the conveying pressure. The system performance tests were carried out to test and analyze the feeding amount and crushing rate of feeds with diameters of 6 mm, 8 mm and 10 mm respectively. The test results show that the average minimum feeding amount is 523.2kg/h, which meets the design requirements, and the maximum crushing rate is 1.12%. With the same conveying distance, the larger the diameter, the lower the feeding efficiency and the greater the crushing rate. Research shows that, through the integration of feeding system and culture management platform, the applicability of automatic feeding system can be further improved.