The utility model provided a door hinge capable of being installed in a concealed mode, a safety door and a cabinet. The door hinge comprises a hinge seat, a hinge body and mandrels. The hinge seat is provided with a first folding part for being connecting with a door frame and a second folding part for being connected with the hinge body. An included angle is formed between the first folding part and the second folding part. Two connecting parts are arranged on the second folding part and respectively provided with a shaft hole, wherein the shaft holes are used for allowing the mandrels to penetrate and insert and are located in a same axis. A through hole for allowing the mandrels to penetrate and insert is formed in the hinge body. The hinge body is located between the two connecting parts, and the mandrels penetrate through and are inserted in the shaft holes of the two connecting holes and the through hole in the hinge body. The door hinge is adopted for the safety door and the cabinet. By the adoption of the door hinge capable of being installed in the concealed mode, the difficulty for destroying an existing safety door is increased, and the anti-theft performance level of the door is improved.