The invention provides a stapler capable of automatically perforating and binding. The stapler comprises a pressing plate, a telescopic spring, a slide block, a staple outlet, a groove and a base. The bottom of the pressing plate is provided with the groove and a pressing rod, and the top of the pressing plate is provided with a miniature motor. The bottom of the groove is provided with the base, the slide block is arranged inside the groove, and one end of the groove is provided with the staple outlet, an infrared sensor and a distance sensor. The slide block is connected with the pressing plate through the telescopic spring, and the bottom of the pressing rod is provided with a round cutter bit. The miniature stapler capable of automatically perforating and binding can identify files and conduct binding and perforating through the infrared sensor and the distance sensor, the pressing rod is driven to move downwards through the miniature motor, accordingly, the pressing plate presses the telescopic spring, and automatic file binding is achieved; and meanwhile, the round cutter bit moves downwards to press the files, so that the files are perforated; and operation is convenient and does not need to be completed manually.