Direct drawing device and direct drawing method for detecting compressive strength of concrete

The invention relates to a direct drawing device and a direct drawing method for detecting compressive strength of concrete, and the direct drawing device comprises a standard part which is bonded with a detected concrete member and a drawing instrument connected with the standard part. The standard part is a cylindrical steel direct drawing standard part, a connecting head is arranged at the center of the cylinder bottom on the outer side of a cylinder, and the connecting head is connected with the drawing instrument. A drawing system consists of a tension sensor, the hydraulic drawing instrument and a load meter. When in use, a bonding agent is used for bonding the cylinder bottom of the cylinder of the steel direct drawing standard part and the inner wall of the cylinder on the detected concrete, the steel standard part is connected with the connecting head, the drawing system is started, and the tension value when the concrete is damaged is recorded, thereby calculating the strength of the concrete. The f