Abstract: Development of intelligent mining technologies for thin seam at home and abroad were introduced. Key technologies principle of intelligent mining system for thin coal seam were focused on including follow-up intelligent technology of hydraulic support on whole working face, intelligent cutting technology of shearer on whole working face, video monitoring technology on working face, electro-hydraulic control technology of hydraulic support, straightness control technology on working face, intelligent remote control technology, intelligent integrated liquid supply control technology and advanced support intelligent control technology. Aiming at problems of thin coal seam mining such as difficulty in mining, low economic benefit and low resource recovery rate, development trend of key technologies of intelligent mining system for thin coal seam was discussed from aspects of three-dimensional intelligent positioning of shearer, intelligent identification of coal-rock interface and intelligent control of hydraulic support.