The invention provides a multipurpose spectrophotometer and particularly relates to a spectrophotometer which is used for spectrum analysis. The multipurpose spectrophotometer comprises a light source, a collimation lens A, a cuvette device, a slit, a collimation reflection mirror A, an optical grating and a linear array photoelectric conversion device, wherein the cuvette device comprises a cuvette bracket and cuvettes; the cuvettes comprise a conventional cuvette and a flowing cuvette; the flowing cuvette is internally provided with a flowing colorimetric channel and the diameter of the flowing colorimetric channel is gradually increased along a flowing direction; the top of the cuvette main body is provided with a sample feeding pipe and a sample discharging pipe; the pipe diameter of the sample discharging pipe is greater than that of the sample feeding pipe; and the sample feeding pipe is connected with a liquid chromatogram flowing-in pipe through a pipeline connector. The conventional cuvette can realize the function of a common spectrophotometer and the flowing cuvette can be used as a liquid chromatogram multichannel luminosity detector; and trace colorimetry can be realized by the flowing cuvette and a trace feeding device. According to the multipurpose spectrophotometer disclosed by the invention, one machine has a plurality of functions, the use cost of an instrument is reduced, the utilization efficiency of the instrument is improved, the integration degree of the instrument is enhanced, and the reasonability of resource configuration of middle-sized and small-sized laboratory instruments is improved.