Objective The study about comparison of the used treatments,to identify the best clinical treat-ment of diabetic neurogenie bladder.Methods 120 in-patients or out-patients with type 2 diabetes ale randomly di-vided into four groups.On the basis ofthe combined treatment,3 groups of A,B and C are given vitamin B12,B and C group are added respectively cisapride or neostigmine,D group are given methycobal.Results Before and after con-trast,the effects of four groups ale significant,but the effects of B,C and D group ale early and very significant;inter-group differences in contrast,between B,C,D group and A group is significant;between B,C and A group is signifi-cant;between B and C group is no significant.Conclusion The effect of neostigmine or cisapride and vitamin jointly can signifiCalltly reduce tlle DNB patients'residual urine in bladder and urinary retention.the effect is better than a simple application of vitamin or mecobalamin;For DNB milds,as appropriate,can use the treatment of mecobalamin.