Abstract: A lot of acidizing treatments have been implemented in order to release pressure and stimulate injection wells of Shanian Oilfield in Jiangsu province. Though achieved some results, it was not so obvious and part of treatments resulted in secondary damage to injection formations, so it was necessary to research into applicable acidizing fluid formula. Physical property and lithology of injection layers were studied firstly associated with core corrosion experiment. Through analysis, concentration and performance of acidizing fluid was evaluated, and its inadaptability was summed up, so as to guide the stimulation treatment of injection wells.