The greenhouse roller shutter machines available mostly are pointing controlled through motor, existing the security problems like easy falling of heat-preserving curtain rolled up. This paper presents a kind of multi-channel priority control device for greenhouse roller shutter machine, achiving the multi-channel control which contains limit control, manual control, remote control and program control for roller shutter machine. The device could improved using safety while the system was controlled more accurately and intelligently. Introduction The greenhouse, which is instrumental in breeding the anti-season vegetables, shortening the growth cycle of crops and improving the crops survival rate, has important significance in the development of agricultural production. There are more and more requirements for the regulation of greenhouse environment parameters with the agricultural modernization rapidly developing and continuous expansion of the greenhouse. The roller shutter machine of greenhouse is an agricultural machinery equipment, which is designed to control the heat-preserving curtain lifting [1]. According to the researches, the incomes per mu of breeding melons, vegetables and edible fungus were more than 6,000 yuan and even up to 10,000 yuan. Particularly the great profits of anti-seasonal vegetables and fruits were the key factors that farmer’s enthusiasm on greenhouse crops production [2]. Plastic greenhouse production bases were built all over the country for vegetables breeding and fresh fruit production, and the scale was increasing constantly. In the greenhouse operation, rolling up and laying the heat-preserving curtain was one of the most time-consuming work, especially at the early morning and evening in the winter. The work in terrible conditions was badly limited the yield profit and development space of greenhouse due to the strong labor intensity and low efficiency. The appearance of roller shutter machine met the farmer’s demand for greenhouse crops production. The machine not only can solve the problem existing in manual rolling up the heat-preserving curtain, but it’s quick operation also makes the illumination time prolonged and crop quality improved which give farmers more energy managing crops easy. In addition, the application of roller shutter machine has a better protection for grass curtain and cotton curtain, and prolongs the service life of curtains thus cutting production costs. The Conventional Roller Shutter Machine The roller shutter machine could be divided into front machine and post machine according to the installation method, and also could be divided into electric machine and artificial machine according to the different power source. The machine most frequently using power was 220V or 380V alternating current [3]. The roller shutter machines available mostly were pointing controlled through motor, and existed the security problems of falling easily of heat-preserving curtain rolled up due to the imperfect control system at present. Electrical motor turned while the finger pressing the button, otherwise the motor would stop and the position of heat-preserving curtain was fully determined by manual control. The phenomenon of rolled heat-preserving curtain falling from the top of greenhouse was often appeared because of miscarriage of justice and the power couldn’t be cut off in time, which 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017) Copyright © 2017, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Engineering, volume 126