Foundation pit measuring device

The utility model relates to the technical field of foundation pit measurement, and discloses a foundation pit measuring device which comprises a support, a bottom plate, an electric rotating roller and a balancing weight. According to the foundation pit measuring device, the balancing weight can be attracted and positioned in the inner wall of the through groove through the arc-shaped magnetic attraction block at the end of the insertion rod, the balancing weight in the foundation pit measuring device and the support can be stored synchronously, the foundation pit measuring device is convenient to carry when people go out, meanwhile, swing rods, telescopic rods and conical blocks in the four sets of positioning mechanisms on the periphery of the support can be rotationally stored in the storage groove, and the practicability is high. The positioning mechanism in the foundation pit measuring device can be quickly folded and stored on the support; the swing rods in the positioning mechanism can be inserted and