In this paper,we consider the existence and integrability of positive solutionfor a class of integral equation closely related to the weighted Hardy-Littlewood-Sobolevinequality:u(x)=∫Rn(up(y))/((b+|x-y|)λ)1/(|y|β)dy,(p〉1,β〉0,0〈λ〈n,b≥0).(32)We prove that system(32) admits a unique positive solution in Ln(p-1)/(n-λ-β)(Rn)∩Lq0(Rn),furthermore,using iterated lemma,we obtain the integrable interval of positivesolution LS(Rn),s∈[min{q0,n(p - 1)/(n -...