Deep foundation pit horizontal displacement continuous monitoring system and method

The invention relates to a deep foundation pit horizontal displacement continuous monitoring system and method. The deep foundation pit horizontal displacement continuous monitoring system comprises supporting piles, observation pillars, measuring pipes, laser distance measuring instruments, reflecting assemblies and an alarming device; the two observation pillars on the same horizontal observation line are each provided with the corresponding laser distance measuring instrument, and the two distance measuring instruments emit laser beams oppositely; the alarming device comprises a data transmitting module, a central processing module and a sound-light alarming module which are connected with the laser distance measuring instruments; and when a horizontal deviation value collected by the laser distance measuring instruments is larger than a preset threshold value, the sound-light alarming module conducts alarming. The deep foundation pit horizontal displacement continuous monitoring system and method have the