Abstract: Abstract: Open-pit coal mine adopts single-dump electric shovel-dump truck-crushing station-strip conveyor semi-continuous process for coal mining production operation. The teeth of WK-35 electric shovel bucket are affected by coal and ore during work. The reaction force is easy to fall off, and the falling tooth together with the raw coal entering the crushing station will cause damage to the crusher, which will lead to the shutdown of the entire mining and crushing production line, causing significant economic losses. The tooth detection system designed in this paper is installed and used on the WK-35 coal mining shovel in Heidaigou Open-pit Coal Mine.It focuses on the development, composition and detection technology of the tooth detection system, and realizes the automatic integrity of the tooth. Identification and alarm.