Research Conclusions:Taking the shield construction of bidding 19 of Line 4 of Beijing metro as an example, this paper analyzes the stratum stress change caused by the excavation and the displacement caused by stratum loss with the monitoring and measurement on the site. The results of analysis and measurement show the deformations can be controlled in the prescribed limit if the parameters of soil pressure, synchronic grouting and boring speed are decided rationally and an effective soil pressure balance is established.