Concrete plate surface flatness detection method

The invention provides a concrete plate surface flatness detection method, which comprises the following steps: 1, conveying a concrete plate to be detected to a position right below a detection equipment frame, and ensuring that the concrete plate to be detected does not exceed the range of the detection equipment frame; 2, adjusting the posture of the detection equipment frame by using horizontal bubbles distributed at four corners of the detection equipment frame to ensure that the two pairs of magnetic slideways in the longitudinal and transverse directions are kept horizontal, thereby ensuring that the infrared distance meter probe is vertical; thirdly, a longitudinal sliding rod driving motor and a transverse sliding rod driving motor are started in sequence, so that a longitudinal scanning sliding rod and a transverse scanning sliding rod move in succession, and vertical distance data, collected by an infrared distance meter in real time, of all parts of the concrete plate to be detected are transmitte