Abstract: In order to discover the feasibility of a reaserch prospect of fully- mechanized coal mining technology with ultra high cutting height in deep mine, based 0 n the successful experience of the fully- mechanized coal mining technology with ultra high cutting height applied to the seam with a shallow mining depth and the analy sis on the development progress of the fully- mechanized coal mining technology with ultra high cutting height in China, the paper stated the features of the fully- mech anized coal mining technology with ultra high cutting height and had an analysis on the feasibility of the fully- mechanized coal mining technology with ultra high cutting height applied to deep mine. The paper held that the fully- mechanized coal mining technology with ultra high cutting height would have high production efficiency, high resource mining rate, simple technical procedure and other advantages. The paper analyzed the key technology required for the fully- mechanized coal mining technolo gy with ultra high cutting height in the deep mine and the problems faced. The analysis showed that a serious mine strata pressure behavior, high deformation of the mi ning gateway and high relibility of the equipment were the main issues faced to the fully- mechanized coal mining technology with ultra high cutting height applied in th e deep mine. Therefore, mine strata pressure behavior law, to have the technical measures of the coal wall stability control and to improve the reliability of the equipme nt were the key issues need to solve for realizing the fully- mechanized coal mining technology with ultra high cutting height.