The quality of highway roadbed construction which affects the overall performance of highway is the most important to the highway construction. The roadbed is the crucial part of highway engineering. Its stability directly restricts the process of the highway roadbed construction, quality and the engineering costs, and relates to the security of people's lives and property, and to the regional economic development. And the roadbed soft foundation treatment is the key to construction of subgrade, usually by apply pad chemical fiber non-woven fabrics, geotextile, glass fiber grating way to deal with soft foundation. This article is to analyze the monitoring data of the highway roadbed engineering and to study the process and means of highway roadbed monitoring[1]. Actually, it helps and guides us to deal with the highway's soft foundation significantly.