Abstract: The deposit insurance fund system is one of the important forms of constructing the government financial safety net, which plays an important role in the prevention of bank run crisis. The effective operation of the deposit insurance fund system is inseparable from the setting of the premium scale that meets the risk characteristics and compensation distribution. In order to clarify the structural change and influence effect of the fund size, the AD-AS fund size research model was built by referring to Keynes theory to explain the rel...