Intelligent railway track geometric state measuring instrument and measuring method

The invention discloses an intelligent railway track geometric state measuring instrument and a measuring method.The measuring instrument is characterized in that a fixed shaft and a movable shaft are arranged at the two ends of a ruler body, two rollers are arranged at the shaft ends of the fixed shaft and the movable shaft, a spring is sleeved with the movable shaft, a push rod is arranged on the ruler body, a display screen is arranged on the push rod, and a microprocessor is integrated in the display screen; the distance measuring sensor is arranged on any roller and detects the rolling distance, the horizontal sensor and the track gauge sensor are arranged in the ruler body, the horizontal sensor detects the levelness of the ruler body, the track gauge sensor detects the telescopic distance of the movable shaft, and the microprocessor is electrically connected with the display screen, the distance measuring sensor, the horizontal sensor and the track gauge sensor. According to the method, the rollers are