In engineering geological survey, people used to adopt electrical sounding methodas electrical exploration. Nevertheless, the electrical sounding method has the defects ofsparse measuring points, insufficient information and, for some detection objects, difficultyin data interpreation. For the purpse of overcoming these troubles, the authors introduced anew method for electrical oxploration-high density resistivity method. Several years application of this method to different detection objects has shown that the high-densityresistivity method is a simple, convenient and effective technique in engineering geological survey.