The work aims to develop a feeding method for hazardous chemical materials with poor fluidity with the feeding method in the metering system of powdery hazardous chemicals as a research object. From the perspective of safety, the reasons why the existing mandatory screw feeding and vibration feeding was not suitable for feeding powdery hazardous chemicals were analyzed. According to the principle of slow feeding, an incentive feeding method was proposed, and its working principle and structural composition were constructed. By controlling the start and stop of the vibration source and the vibration frequency, as well as the opening and closing angle of the feeding door, fast, slow and uniform feeding was realized. Then the discrete element simulation software was used to simulate the slow feeding process, and the vibration force required for uniform and continuous falling of materials was analyzed. The relationships between the feeding flow and the vibration frequency, amplitude and size of the outlet were obtained. The incentive feeding method was suitable for the feeding of powdery hazardous chemicals and could meet the feeding requirements. Based on the above conclusions, the feeding equipment is designed and manufactured. According to the testing, the device fully meets the requirements of fast and slow feeding in the metering system. This method has certain guiding significance for feeding the same type of materials.