In order to study the influence of different shield tunneling parameters on the surface subsidence value and formation loss rate during the tunnelling process in composite strata of earth pressure balance shield machine，based on the monitoring data for surface subsidence in the shield tunneling line between Hunan Business School Station and Baigeju Station，the Peck formula was used to infer the ground loss rate of shield tunneling under such strata conditions. The influence extent of each parameter on the surface settlement value and formation loss rate was analyzed by 3D finite element simulation. The results show that with the increase of driving thrust，the width of settling groove decreases and the settlement value increases，and the formation loss rate increases. When the pressure of the earth chamber increases，the width of the settling groove decreases the settlement value increases slightly. When the grouting pressure increases，the width of settling groove decreases，the settlement value also decreases，and the formation loss rate decreases. The sensitivity of shield tunneling parameters to stratum loss rate and surface subsidence were ranked according to the shield tunneling parameters in the upper soft and lower hard composite stratum，which is expected to provide a reference to deformation control during shield tunneling in such stratum.