Frame structure of storage cabinet

The utility model discloses a frame structure of a storage cabinet, and relates to the technical field of storage cabinets. The technical problem that the volumes of storage boxes of an existing storage cabinet are inconvenient to adjust is solved. The frame structure comprises a plurality of stand columns, and at least one transverse beam is arranged between every two adjacent stand columns. A plurality of pistol holes arranged to be linear are formed in each stand column at equal intervals from bottom to top. The pistol holes are square through holes which are through in the radial direction, and a downwards-sunken bayonet is formed in one bottom corner of each pistol hole. The two ends of each transverse beam are each provided with an upper L-shaped buckle and a lower L-shaped buckle, the L-shaped buckles at the two ends of each transverse beam are buckled into the corresponding pistol holes in the stand columns on the two sides and embedded into the bayonets in the bottom corners of the corresponding pistol holes, and a transverse bent part of each L-shaped buckle abuts against the portion, on the outer side of the corresponding pistol hole, of the surface of the corresponding stand column. By means of the frame structure, the volumes of the storage boxes can be conveniently and rapidly adjusted.