Van unloading lock

The utility model discloses a van unloading lock which comprises a first lock shell and a connecting structure mainly used for an unloading lock, a first lock hook is fixedly installed at the top end of the first lock shell, and the first lock hook is of an inverted-L-shaped structure; the first cavity is formed in the inner side of the first lock shell, and the first cavity is formed in the left end and the right end of the first lock shell in a penetrating mode; the second lock shell is movably connected to the inner side of the first lock shell, the second lock shell is arranged on the inner side of the first cavity, and a telescopic structure is formed between the second lock shell and the first lock shell; according to the discharging lock for the van, opening and closing of a cargo door of the van can be conveniently controlled, meanwhile, the opening and closing degree of the cargo door can be adjusted according to the actual use condition, and therefore the discharging speed of cargoes can be adjusted