Objective To assess the cervical lymphatic function of normal rats using an Indocyanine Green Near-Infrared (ICG-NIR) Imaging system.Methods ICG was injected into pharynx of the rats, the neck were illuminated with a 780-nm NIR laser to record the movement of ICG.There are five indicators to quantitative lymphatic function(Figure 1): S-max;T-max;clearense of injection site and lymph nodes;T-max and the pulse of Lymph vessel.(Figure 2).