Abstract: The characteristics of the subway exploration, one is the exploration that not bought the land for construction, the other is the exploration that underground system engineering. The subway exploration of our country experiences the three history development period witch explore,accumulate and standardization, each period carry on works according to four exploration stages that is possibility research exploration,the preliminary exploration, the detailed exploration and implemental exploration. According to the subway design requests and geology circumstance to adopt diversification text instrumentality, exploration contents completely, techniques gradually perfect, have obvious specialization features. Aftertime should be combining the construction's methods and design requirements of metro, research and concluded the test technology of special design indicators, solve the seismic design problem that subway structure at the fourth-saturated water-filled sand, strengthen research adaptability of new technologies and new methods of construction in different geological conditions, we must work hard in security and speedy construction and cost reduction etc.