Sliding fastening device and waterproof and dustproof wire duct

The utility model relates to the technical field of line protection, in particular to a sliding fastening device and a waterproof and dustproof trunk.The sliding fastening device comprises a shell assembly and an outer shell, a fastening assembly is installed on the inner side of the outer shell, and the fastening assembly comprises a limiting plate, a rotary limiting column located at one end of the limiting plate, a sliding positioning column located at the other end of the limiting plate and a connecting rod; according to the utility model, the problems that the conventional trunking is inconvenient to disassemble when being disassembled and used, and the disassembly core part is positioned outside the trunking and is easy to accumulate dust, rust and the like are effectively solved, the hidden dangers of water leakage and dust accumulation caused by insufficient waterproof and dustproof functions of some trunking are completely eradicated, and the disassembly and maintenance efficiency of personnel is imp