The utility model discloses a tank body conveying mechanism which comprises a plurality of conveying structures used for enabling a tank body to move at a set speed, a feeding structure is arranged on the inlet side of one or more conveying structures, a plurality of positioning structures are correspondingly arranged on the conveying structures, and the conveying structures are divided by the positioning structures to form a plurality of retention intervals. And a plurality of tank bodies are closely arranged in the retention interval, and the feeding structure continuously acts to continuously feed the tank bodies of the previous conveying structure into the inlet side of the next conveying structure and drives the tank bodies in the next conveying structure to move in the process. The feeding structure can be arranged on the outer side of the conveying structure, so that transmission of the conveying structure is not prone to being interfered, on the other hand, the feeding structure can control the feeding frequency to a certain degree, and therefore
material balance between different conveying structures is coordinated.