The invention relates to an attaching device for a sheet-like self-adhesive material. The attaching device comprises a conveying device, a first sensor, a second sensor, a labeling mechanism and a controller, wherein the conveying device is used for driving an adherend to move along a first travelling path; the first sensor and the second sensor are arranged in sequence in the advancing directionof the first travelling path; the labeling mechanism is used for driving an identification card to move along a second travelling path; the controller is electrically connected to the conveying device, the first sensor, the second sensor and the labeling mechanism; the second travelling path and the first travelling path are slantwise arranged; the advancing direction of one side, facing toward the first travelling path, of the second travelling path is the same as the advancing direction of the first travelling path; and the tail end of the second travelling path is connected to the first travelling path and is located at one side, backing on to the second sensor, of the first sensor. The device automatically adheres the identification card to the adherend, and does not need to be manually operated in the operational process, thereby releasing manpower, reducing the cost of manpower and manufacturing, and improving the adhering quality and working efficiency.