The active earth pressure subjected to retaining wall has always been an important subject of soil mechanics, but there is still no analysis on earth pressure for embankment wall of cohesive backfill of curved rupture surface with soil cracking considered. In order to remedy this defect, two limit equilibrium methods of the existing cycloid failure surface and plane failure surface with soil cracking considered were used for reference to carry out research. Firstly, a differential layer in slipping soil was taken, and the earth pressure formula for arbitrary inclination angle of retaining wall back and backfill soil surface, filling property and contact conditions between wall and soil was derived by the element static equilibrium analysis. Then, the cracking process of wall-top backfill and its depth algorithm were studied, and the extreme value was solved by computer programming, and further the active earth pressure analysis method for cohesive backfill on embankment wall of curved failure surface with soil cracking considered was established; the results of earth pressure analysis method of cycloid failure surface without filling cracks and the modified method of layer analysis with filling cracks were compared respectively in various examples, which proved that this method was reasonable and superior. Finally, the unique reasonability and application scope of this method are further verified via the example analysis of variable cohesive backfill on embankment toe retaining wall, which proposed the problems and suggestions for the design of such retaining wall.