Practical detection and calculation device

The utility model discloses a practical detection and calculation device in the technical field of building hole measurement, which comprises an inverted T-shaped main support formed by combining a left cross rod, a right cross rod and a vertical rod, the left cross rod and the right cross rod of the inverted T-shaped main support are respectively provided with a main hole, and the vertical rod of the inverted T-shaped main support is provided with a left group of wire holes and a right group of wire holes which are respectively communicated with the two groups of main holes. Self-adaptive telescopic rod assemblies are positioned in inner cavities of two sets of main holes of the inverted-T-shaped main support, pressing sleeves are arranged at the ends, extending out of the inverted-T-shaped main support, of the self-adaptive telescopic rod assemblies, ropes are fixedly arranged between the pressing sleeves and the adjacent ends of the self-adaptive telescopic rod assemblies, and limiting clamping blocks are