Objective To find a more perfect method of treating developmental dislocation of the hip(DDH). Methods From March 1994 toDecember 2002, on the basis of the ordinary operative method, Pemberton method was improved for 48 cases of DDH 49 articulatio coxae which had superficial and small acetabula but bigheads of femur. Osteotomy points were moved higher to enlarge area of bone flapturned over. A piece of full thickness ilium including periosteum was removed as a free bony graft. Capsula articularis growing thicker was made into 2 layers, of which the inner layer was used to tighten articularis and the outer layerwas used to stabilize bone flap. Results All patients were followed up for 18 months to 5 years, the function of articulatio coxae and degree of bony union, inclusion area to head of femur and ischemic necrosis of femoral head were observed through X-ray. According to Zhou Yongde’s criteria for the curative effect of congenital dislocation of the hip, there were 18 cases of 26-30 scores(3 hips), 27 cases of 21-25 scores, 2 cases of 1620 scores(3 hips), and 1 case under 15 scores, and the total superior ratewas 93.8%. Conclusion Improved Pemberton method can enlarge inclusion area tohead of femur, avoid decreasing acetabular volume, and stabilize articulatio well, which made operative indication bigger than original Pemberton method.