The connection aisle construction technology of mechanical method has the characteristics of good construction quality, small disturbance to the environment, small settlement in the later stage, and no damage to the structure, so it is gradually applied to the transportation construction fields such as highway and rail transit. At present, there are not many researches on the application of connection aisle construction technology of both mechanical method and shield method in the construction of urban rail transit at home and abroad. In this paper, the key processes of mechanical method connection aisle construction technology in urban rail transit transportation construction project are analyzed, and then Suzhou Line 6 project is taken as an example, finite element software is used to simulate and analyze the surface settlement, deep soil settlement, deep soil horizontal displacement and tunnel displacement, and finally several suggestions for the construction of mechanical method connection aisle are proposed. The simulation results show that: 1) The influence range of mechanical method connection aisle driving on the surrounding environment of the tunnel is 0 ~ 20 m, and the influence value of surface settlement is about 18 mm; 2) The top surface of the connection aisle has a large settlement, the bottom surface has a large uplift, and the opening of the main tunnel also shows such phenomenon as settlement of the upper opening and uplift of the lower opening. The results can provide a certain reference for construction method of urban rail transit connection aisle.