The utility model discloses a quick detection device for the content of aspartame in sugar-free coke. The quick detection device comprises a data storage device, a CCD (Charge Coupled Device) spectrograph, a light path switcher, a reflection collimating lens, a transmittance collimating lens, an optical filter, an objective table, a reflector, a beam splitter and a light source, wherein the data storage device is connected with the CCD spectrograph, the CCD spectrograph is connected with the light path switcher, the light path switcher is respectively connected with the reflection collimating lens and the transmittance collimating lens, the optical filter is arranged at the front end of the reflection collimating lens, the objective table is arranged at the front end of the transmittance collimating lens, a to-be-tested sample is arranged on the objective table; in addition, the light source is arranged at the front end of the beam splitter, the reflector is arranged at one side of the beam splitter, the beam splitter is located at the front end of the objective table, and the reflector is located at the front end of the optical filter. The quick detection device has the advantages of being free from pretreatment of the sample, quick and real-time to detect, simple and convenient to operate and low in time consumption; by adopting the quick detection device, the work efficiency is effectively improved, and the labor intensity and the production cost are reduced.