Abstract: A large number of rice "standing-stalk" and "stubble" will remain in the paddy field after the rice is harvested by a combined harvester. At present, the harvest rate of rice "standing-stalk" and "stubble" remained in the paddy field after joint harvest using single baling machine is low. The single baling machine is usually pulled by a tractor which causes intermittent collection and baling of stubble in paddy field. The working efficiency of traditional baling machine is low due to the halt of the baling machine when unloading the baling wire. In this paper, threshing and cleaning device and the grain tank in existing rice and wheat combine harvester were replaced with round baling device. The rice and wheat combine harvester, in which threshing and cleaning device and grain tank were disassembled, was used as the self-propelled tracked collection platform. A design idea of setting collecting device at the exit of conveying groove and the feed port of baling device as cache area and using round baling device as the main working part was put forward to solve the problem of discontinuity caused by the round baling device failing to feed during the unloading of bales. The collecting device was set at the position of the original threshing device directly behind the conveying groove, straw thrown from the conveyor groove was fed to the baling machine's transfer area after passing through the cache area, and the bottom part of the collecting box of the material collecting device was successively arranged with the brush rod and the conveying auger. The round baling device was set directly behind the cab, and the rotary shaft of the spring-tooth picking machine located in the feeding port was installed in parallel with the conveying auger shaft, which not only ensured the connection between the outlet of the collecting box and the feeding port of the round baling machine, but also realized the reasonable configuration of the center of gravity of the whole machine and improved the passing ability of the whole machine. In this way, a rice straw continuous collection and baling machine used in paddy field and with functions of harvest, pickup, collect, bale and bundle was developed, which realized the multi-use of the combined harvester and reduced the cost. The whole machine adopted mechatronics technology. An automatic control system of loading and unloading of baling was designed. The six-way commutator switch was adopted as the sensing and detection component, which simplified the operating process of the manipulator, ensured the automatic operation and monitoring of the whole loading and unloading process, and effectively improved the working efficiency of key components. The structure and motion parameters of each functional component were optimized and the whole machine was finally coordinated and working continuously and efficiently. The continuous collection and baling requirements of rice straw in paddy field including "standing-stalk" cutting, stubble picking, collecting, baling and binding can be completed at one time. The field performance test showed that the performance of the whole machine was safe and reliable. Under the working conditions on working gear, the faster the operation speed, the shorter the time of collecting a straw bale, the shorter the compression time of rice straw bale in the bundling room, the higher the efficiency of bundling, but the worse the specification degree of cylinder. After a continuous operation of 3.4 h at medium speed, the binding rate was 98%, the operating efficiency was 0.4 hm2/h, and the harvest rate of straw was 95%. All other technical indicators met the relevant standards and requirements of agricultural work were met. This study provides a reference for improving the utilization rate of straw after mechanized harvest and realizing the multi-use of one agricultural machine in agricultural production.