In order to explore the effect of extracellular metabolites of psychrophilic bacteria in Huanglong water on the travertine deposition rate and deposition products, the authors started with the Huanglong travertine water isolated advantage of indigenous psychrophilic bacteria, and took its landmark extracellular metabolites D-glucose and D-ribose as the object of study. The effects of two kinds of monosaccharide components on the deposition of travertine were investigated and, by means of X-ray diffraction (XRD), scanning electron microscope (SEM), infrared absorption spectroscopy (FT-IR) analysis, the types of calcium carbonate crystal morphology and structural composition were characterized. The results are as follows:D-glucose could promote the deposition of calcite-type calcium carbonate at low temperature and accelerate the deposition rate. The deposition products of low concentration (20 mg/L, 40 mg/L) were all calcite calcium carbonate and had a certain effect on their morphology; high concentrations (80 mg/L and 160 mg/L) could induce the synthesis of small amounts of aragonite calcium carbonate. D-ribose could promote the deposition of calcium carbonate at low temperature and accelerate the deposition rate. Unlike D-glucose, D-ribose could only synthesize calcite-type calcium carbonate, but it was an inhibitory effect on the growth of calcite crystal face, and its inhibitory effect was obvious with increasing concentration. The results can provide a theoretical basis for the exploration of Huanglong travertine.