In order to improve the shortage of traditional pavement base materials, a new type of material with reasonable technology and good performance was sought for pavement base layer, and the 3001-day compressive strength of ISS, LE-6003 and LPC-7 liquid soil stabilizer stabilized soil was tested through indoor tests, and a comparative test of limestone soil was made. The results show that the addition of a small amount of lime can significantly improve the strength of liquid soil stabilizer, which has obvious significance for reducing the dose of lime, improving the strength of the base layer and reducing the thickness of the base layer. It provides a scientific basis for the promotion and application of liquid soil stabilizer.