Construction device and method for channel between existing underground space and shield tunnel

The invention relates to a construction device for a channel between an existing underground space and a shield tunnel. The construction device comprises two rows of parallel stand columns corresponding to the set positions of the channel and erected on a bottom plate of the underground space, and height adjusting assemblies installed on the stand columns and capable of moving up and down along the stand columns, wherein each height adjusting assembly is provided with a first clamp, the top end of a pipe joint is clamped through each first clamp to enable the pipe joint to be fixedly connectedto the corresponding height adjusting assembly, downward pressure is applied to the pipe joint through downward movement of each height adjusting assembly to press the pipe joint into a soil body, the height adjusting assemblies can drive the pipe joint to descend synchronously, so that the sinking depth of the pipe joint is controlled conveniently, and the problems that the position of the pipejoint deviates and the str