Abstract: In view of the complicated geological conditions, the feasibility of applying fully-mechanized mining technology with large mining height in Yangquan Mini ng Area is lack of scientific and rigorous demonstration, based on No.8310 and No.8303 coal mining faces in No. 1 Mine of Yangquan as the background, the theoretic al analysis, numerical simulation and site measurement were applied to study the disaster mechanism and features of the surrounding rock under the condition of the hi gh cutting. The paper held that the high cutting fully-mechanized coal mining face was highly affected by the roof structure, seam strength, structure and overhead mini ng angle as well as other factors.Then with No. 81303 standby coal mining face as a case, an analysis was conducted on the mining condition of the coal mining face a nd the paper held that a rational mining height of the high cutting mining in No.81303 should be controlled below 5.5 m. Due to a low seam strength, high thickness, hig h inclination, broken roof, geological structure development and other unfavorable factors, the suitability to one pass full seam mining of No.81303 coal mining face wO uld be poor.