Abstract: Soil conditioner was applied to acidic soil of Changle City to study its effect on soil and balsam pear. The results showed that the application of soil conditioner increased the soil pH value, improved the characters of leaf and commodity of balsam pear, and thus significantly increased the yield of balsam pear. Among different treatments, the application of 150-200 kg/667 m² was better and had the obvious economic benefit.