Concrete column foundation detector

A concrete column foundation detector disclosed by the present invention comprises a first connecting rod, a second connecting rod, a first fixing ring, a second fixing ring and connecting pieces, the first connecting rod is fixedly connected with the first fixing ring, the second connecting rod is fixedly connected with the second fixing ring, the periphery of the first fixing ring is provided with a plurality of connecting pieces, and the connecting pieces are fixedly connected with the second fixing ring. The distance between the connecting pieces ranges from 1 cm to 2 cm, the other ends of the connecting pieces are connected with the second fixing ring, the diameter of the first fixing ring is the same as that of the second fixing ring, and the first fixing ring drives the connecting pieces to rotate to define a conical net cover with an upward opening when rotating relative to the second fixing ring. According to the concrete column base detector, the resistance of being inserted into concrete is reduced