The invention discloses a multifunctional measuring instrument comprising two measuring instruments. Each measuring instrument comprises a display end, a rotary connector, and a measurement end. Each rotary connector is hinged to the corresponding display end, and can freely swing back and forth relative to the display end. Each measurement end is hinged to the corresponding rotary connector, and can freely swing side to side relative to the rotary connector. Each measurement end includes a water level pipe and a connecting block arranged at one side of the water level pipe. Each water level pipe is provided with scales extending along the axis of the water level pipe on the sidewall. The water level pipes of the two measuring instruments are communicated by a connecting pipe. Each connecting block is provided with a through slot extending along the axis of the corresponding water level pipe. At each through slot, a sliding key connected with the through slot in a sliding manner is arranged. Each sliding key is equipped with a laser light and a pointer used for pointing to a scale. The multifunctional measuring instrument has the advantages of simple structure, large measuring range, high adaptability and high measuring accuracy, and can be used to measure multiple parameters of a measured object simultaneously.