The invention discloses a steeply inclined seam dip oblique strike longwall comprehensive mechanical 
coal mining method. The method comprises the following steps: preparation: digging a first laneway and a second laneway at the upper end and the lower end of the steeply inclined seam respectively; forming an initial mining working surface with the pitching oblique mining 
angle alpha of 25 to 35 degrees between the two laneways; arranging a 
coal mining 
machine, a scraper plate conveying 
machine, and a plurality of hydraulic brackets which are 
parallelogram-shaped in the overhead view and form a 
supporting system on the initial mining working surface; arranging the 
machine head of the scraper plate conveying machine behind relative to the machine 
tail while the hydraulic brackets in the propelling direction are sequentially behind a certain distance from the machine 
tail of the scraper plate conveying machine; arranging a reversed 
loader on the second laneway; 
coal mining: 
cutting coal up and low by using the coal-mining head of a coal-mining machine; moving the brackets: moving the hydraulic brackets sequentially from bottom to top; pushing and sliding: pushing and sliding by using a scraper trough conveyor of the scraper plate conveying machine in strokes to finish one time pushing and sliding quantity; and transporting coal: transporting coal to the outside by using the reversed 
loader. According to the method, the steeply inclined seam comprehensive mining operation is realized conveniently, and 
recovery ratio and 
resource utilization ratio are increased.