The invention discloses a bag filling and throwing technological method and device for a shelf conveyor. The bag filling and throwing technological method and device can well avoid the dilemma that sand sources are in shortage in the bagged sand construction technology in the field, and a new idea is provided for the bag filling and throwing bag construction method in the embankment surrounding lank making project. The bag filing and throwing technological method includes a feeding system, a conveying system and a bag throwing system. The conveying system is the body of the whole device. The inner side, located in the conveying system, of the feeding system is close to a filler source end, and the outer side, located in the conveying system, of the bag throwing system is closed to a water end. According to the bag filling and throwing technological method for the shelf conveyor, a set of efficient bag filing and throwing construction technology and matched device of the technology are designed and developed and are feasibly used for fine-particle soil with floury soil serving as the representative, the sand soil bottleneck problem of the traditional bagged sand construction technology is solved, and the problems that in a traditional centrifugal bag filling technology, the concentration of pumped fine-particle soil is low, the soil in a mud storage pool is stirred unevenly through high-pressure flushing, the draining period is long after bag filing, solidification is hard, the requirement of embankment building can be met only through multiple times of repeated bag filling, and the bag filling efficiency is low are solved.