The three axis size, density, angle of internal friction, and angle of repose for Panax notoginseng seeds with different moisture content were measured as well as the angle of static sliding friction and dynamic sliding friction with different contact materials under various floating speed. The results showed that: length, width and height of Panax notoginseng seed is 5.8-7.2 mm, 4.8-6.8 mm and 4.0-6.0 mm, respectively; the average diameter is 5.62 mm and the sphericity is 90.86% indicating the Panax notoginseng seed can be approximate to sphere. The seeds density decrease linearly with the decrease of water content. As a decrease in moisture content, the angle of internal friction and the angle of repose firstly decreased and then increased to maximum value as well as the angle of sliding friction. The average floating speed is 5.77-8.96 m/s, which presents a linear positive correlation with the moisture content.