Inclination measuring device for foundation pit support

The invention relates to the technical field of foundation pit inclinometry, in particular to a foundation pit support inclination measuring device which comprises a mounting seat, two cables and a connecting rod, the mounting seat is provided with two pay-off total cylinders capable of rotating around the axis of the cable, and the two pay-off total cylinders and the two cables are arranged in a one-to-one correspondence mode. One end of each cable is arranged at the first end of the connecting rod, and the connecting rod is provided with a probe. In the using process, the connecting rod is arranged in a suspended mode, one pay-off main cylinder rotates for paying off, the other pay-off main cylinder keeps still, when the tension of a cable on the pay-off main cylinder for paying off is zero, the pay-off length of the cable serves as the lowering depth of the connecting rod, the two pay-off main cylinders rotate at the same time for paying off, and when the connecting rod is lowered to the preset depth, the