Auxiliary hole passing device of drainage pipeline inspection robot

The utility model provides an auxiliary hole passing device for a drainage pipeline inspection robot. The auxiliary hole passing device comprises a fixed platform; the telescopic platform is in sliding connection with the fixed platform in the first direction; the telescopic supporting assembly is connected with the fixed platform, and the telescopic supporting assembly lifts and supports the fixed platform; wherein the fixed platform is located in the via hole, the fixed platform and the part, extending out of the fixed platform, of the telescopic platform form a channel for the drainage pipeline inspection robot to pass through, and the length of the channel is adjusted by adjusting the sliding position of the telescopic platform. The length of the channel is adjusted by adjusting the sliding position of the telescopic platform on the fixed platform, so that it is ensured that the drainage pipeline inspection robot can pass through the via hole. Therefore, the inspection well can be smoothly passed. Therefo