The relationship between peripheral blood platelet-to-lymphocyte ratio (PLR) and the type 2 diabetic nephropathy was investigated.PLR was positivly related with microalbuminuria(P<0.01).The multifactor logistic regression analysis showed that PLR was a risk factor of type 2 diabetic nephropathy (OR =2.012,95% CI 1.000-5.023,P<0.05).