The po or physical and chemical features of the topsoil in wa terlogg ed a nd fla t lowland are the major o bstacle facto rs fo r high and stable so ybean yield. The model o f trideepnessand banding- type tillag e and cul tiv ation i s a comprehensiv e technique systmew hich co nsi sted of deep loosing , ro tary tillag e, soi l preparatio n and ba nding- type cultivation, w hich chang ed the t raditional tillag e pat tern a nd w as sui table to soybea n po pulationst ructure in wa terlog ged and f lat low land. The ex perimental result s show ed thatthe model o f t ri- deepness and banding- ty pe til lag e and cultiv atio n ro se to psoi l temperature by 0. 8℃ , low ered soi l uni t w eight by 0. 198% g /cm3 , decreased wa ter contentby 10. 1% , increased available N、P and K by 19. 2% , 58. 9% and 36. 7% respectiv ely.The ratio of non- ca pi llary cav ity and capillary cavity was chang ed f rom 1∶ 3. 15 to 1∶1. 66; The LAI of soy bean increased by 32. 3% and g rain yield increased by 15. 1% fo rthree years.