The overproof iron ionic concentration in the ground water which is used as the drinking water source is deterimental to residents drinking water safety.Thus,studying its migration law could support the protection work of ground water which is used as the drinking water source.This paper aims to construct the iron ionic migration generalized model of ground water within the Tongjiang River protective zone so as to analyse the migration law of iron ions under the condition that protective layers are installed or not between the Tongjiang protective layers,variation of iron ionic concentration appears to be a hook-like form of development with fast migration velocity and broad diffusion.Yet,with protective layers,variation appears to be a ligulate form with much slower limit their migaration range,they could never solve the problem of iron ionic migration ultimately.