According to the sowing and cultivating models of Heilongjiang at the momment, their effects onsoybean yieldwas studied . Three cultivation model were adopted on the basis ofthree ridge cultivation : theordinary ridge ,45cm ridge after narrow row solid –seeding , mulching on row-row of ordinary ridge , big area contrast was adopted on the the trail design .the results was :the best oneis 45cm ridge after narrow row solid-seeding,thenext oneismulching on row-row of ordinary ridge.