Abstract: The difficulty in farmer profession cooperative （FPC） loan is an imperative issue to be solved during rapid development of FPC at present. The loan gap of FPC was explained by information asymmetry and credit rationing theory in economics. The results showed that the credit rationing was a rational choice of financial institutions in granting a loan to FPC， which forms the loan gap of FPC at last， due to the moral hazard and adverse selection caused by information asymmetry between financial institutions and FPC， and the FPC′s imperfect in China in FPC loan market.

Key words: information asymmetry, credit rationing, FPCs loan, financial institutions