In the operations acidification, the Fe3+ easily forms Fe(OH)3 precipitation which cause secondary damage of strata. Self-made synthetic ferric ion stabilizer SWLY-1 with ferric ion can form a stable soluble chelate. In this paper, the relative property of SWLY-1 was investigated. The results showed that the ability of stability stable ferric ion of SWLY-1 of 1435 mg/g. The maximum resistance of SWLY-1 to high temperature was of 150℃ and the solubility was good in water, 20% hydrochloric acid, mud acid（12%HCl+6%HF）.The damage of SWLY-1 on the core permeability was low, and it had good compatibility with other acid additives. With the stability constants at different pH values as evaluation index, several ferric ion stabilizers including SWLY-1, EDTA-2Na, citric acid, oxalic acid and acetic acid, was arranged as follows: SWLY-1>EDTA-2Na>citric acid>oxalic acid > acetic acid.