Large-area concrete flatness detection device and method

The invention discloses a large-area concrete flatness detection device and method. The device comprises a handheld part which is provided with a circuit board and a deflection detection unit, and a roller traction assembly which is rotationally arranged on the handheld part, and the deflection detection unit is used for detecting swing data of the roller traction assembly. According to the large-area concrete flatness detection device and method provided by the invention, the large-area concrete is detected, the roller traction assembly keeps synchronous along with upward floating of the ground, so that the deflection detection unit is triggered, the up-down fall amplitude is broadcasted through voice, workers can quickly search for leveling, the operation is simpler, the operation difficulty is low, the detection efficiency is greatly improved, so that the problems that the construction efficiency is relatively low and the leveling effect is poor due to the fact that detection is carried out while grinding