Study on artificial pasture planting in agro-pastoral region in Ningxia was carried out by L₁₈（6×3⁶） orthogonal test to selecting the best set of artificial pasture planting and analyzing the reliability of orthogonal test.The results showed that the optimal combination of pasture adaptation is Medirago sativa+organic manure 36 tons·hm^-2+moderate levels of NPK(N 165 kg·hm^-2+P135 kg·hm^-2+K 135 kg·hm^-2+straw residues of Sophora alopecuroides 10 tons·hm^-2,which has the best adaptability and it is consistent with Test 12.The impact of species and organic manure on forage adaptability was greatly,while effect of NPK and plant residue was smaller.The optimal combination of yield is Melilotus suaveolens L.+organic manure 36 tons·hm^-2+ Moderate levels of NPK(N 165 kg·hm^-2+P 135 kg·hm^-2+K 135 kg·hm^-2+straw residues of Sophora alopecuroides 10 tons·hm^-2,which has the highest yield and it is consistent with Test 15.Among of all factors,effect of species and NPK on plant height and yield was greater and plant residue was smaller.At the same time it proved that using the orthogonal test was reliable for the establishment of artificial pasture.