Packaging box with high-strength fast-assembly buffering corner protectors

The invention discloses a packaging box with high-strength fast-assembly buffering corner protectors. The packaging box comprises a box body and the buffering corner protectors, the buffering corner protectors are arranged in the box body, and each buffering corner protector comprises a first buffering part, a connecting part and a second buffering part, the first buffering part and the second buffering part are perpendicular to each other and attached to the connecting part connecting the first buffering part and the second buffering part, the first buffering part comprises at least two first buffering assemblies, the second buffering part comprises at least two second buffering assemblies, each first buffering assembly is detachably and fixedly connected with the corresponding second buffering assembly through a mortise and tenon embedding part, and the included angle formed between every two adjacent first buffering assemblies is consistent with the included angle formed between every two adjacent side wal