In the blasting engineering of highway excavation,the slope stability and flat-ness must be sure. The key to reaching this object lies in selecting blasting technical schemewhich should have good damping effect.Taking a example of highway excavation project inJinan,the chamber and millisecond delay blasting scheme was described.Blasting parame-ters,chamber layout pattern,millisecond delay interval. priming sequence etc, were rationallydetermined.In the practice,a good blasting result was gained and the useful experience forside slope protection in highway excavation was provided.