Abstract: Two types of digital levels (Zeiss DiNi12 and Trimble DiNi12) are checked in site and field.The field experiment is carried out in the west of Tianjin.The leveling route reaches 409.3km in length, including 131 segments, which form 13 closed leveling lines.The experiment results indicate that single reading accuracies of first-class can be achieved even when sight distance is below 50m, and the working speed is about 5.4 km per day.For cross-fault deformation observation, the leveling route is 115.9 km in length, which is divided into 131 segments with sight distance below 30 m.The working speed reaches 2.8 km per day.These experiments show that DiNi12 Digital level can applied in region leveling instead of Ni002 and Ni002A automatic levels.