Chemical dosing mechanism and disinfection tank

The utility model discloses a dosing mechanism and a disinfection tank in the technical field of sewage treatment. The dosing mechanism comprises a dosing component, a medicine barrel arranged above the dosing component, a floating component sleeved on the medicine barrel, and a sealing cover arranged at the top end of the medicine barrel, the medicine feeding assembly comprises a hopper arranged below the medicine barrel, material stirring assemblies arranged on the two sides of the hopper and a blocking assembly arranged in the hopper. According to the utility model, the floating component drives the material stirring component to automatically feed medicines, the mixing of the medicines and sewage can be accelerated through the rotating material stirring component in the feeding process, and the medicines can be timely diffused in the reaction tank under the driving of the sewage injected from the flowing hole, so that the medicines and the sewage are uniform and well matched, and the medicine feeding effi