Abstract: To provide evidence for developing and utilizing the dry cocoon silk reeling pupa, the dry cocoon silk reeling pupa from different regions are evaluated by sensory evaluation, nutrition components analysis, and health indicators analysis. Methods: Sensory scores and colorimeter were used to measure the sensory index of silk reeling pupa. Chemical methods were used to detect the nutrition compositions and hygiene indexes of dry cocoon silk reeling pupa. Results: Of the 22 samples, only 2, 14, 18 and 20 silkworm chrysalis samples had better sensory quality. In 22 regions, the basic compositions of silk reeling pupa were in the range of: water (3.95% to 11.41%), total protein (51.18% to 58.40%), total fat (28.13 to 42.28 g/100g), cholesterol (237.37 to 459.87 mg/100g). The contents of minerals were in the range of: calcium (270.40 to 632.29 mg/100g), iron (34.44 to 215.92 mg/100g) and zinc (115.67 to 151.40 mg/100g). The contents of harmful substance were in the range of: volatile basic nitrogen (7.21 to 78.79 mg/kg), trimethylamine (5.08 to 32.04 mg/kg), nitrite (21.97 to 127.15 mg/kg), acid value (7.35 to 73.06), malondialdehyde (0.87~5.86 mg/kg). The contents of harmful elements were in the range of: mercury (0.004 to 0.108 mg/kg), chromium (0.65 to 3.89 mg/kg), lead (2.42 to 12.61 mg/kg). Cadmium is not checked out. Conclusion: In 22 regions, the nutrition of dry cocoon silk reeling pupa is abundant. But, their sensory quality, protein degradation and lipid oxidation are grave in some regions. What’s more, the content of nitrite exceeds standard and were polluted by harmful elements. If the dry cocoon silk reeling pupa was used as food material, the process of dry cocoon silk reeling should be control rigorously.

Key words: dry cocoon silk reeling pupa, quality, evaluation