The work aims to design an automatic filling device for noodles, in order to solve the problems such as residues and unsmoothness in M bag automatic filling of noodles with 1-2 kg/bag. According to the characteristics of M-type packaging bag, the structural design of the noodle filling device was carried out by adopting the modular and integrated design method and the optimized combination with the existing equipment, based on the analysis of the working principle and technical requirements of the noodle filling device, so that the noodle could be put into the bag smoothly in the filling process, and the packaging efficiency was improved. The three-dimensional modeling of the noodle filling device was carried out with SolidWorks software, and the virtual assembly was conducted. The rationality of structural design was verified according to the experiment of 3D virtual prototype and machining physical prototype. The success rate of filling noodles with packaging specifications of 500, 1000, 1500 and 2000 g/bag were 95%, 90%, 90% and 80%, respectively. The structure of the newly designed noodle filling device is reasonable, which can realize the smooth bagging of the noodles, and provide some reference for the key device design of the rotary bag-type automatic noodle packaging machine.