Based on monotonic direct shear tests, the effects of normal stress and shear rate on the interface properties such as shear stress, shear displacement, shear strength and shear modulus of interface between non water reacted polymer geotextile and polymer sand were studied. The test results show that, under the same mormal stress and shear rate, with the increase of shear displacement, the polymer geotextile interface and the polymer sand interface show shear softening characteristics. The mormal stress has a significant effect on the shear strength and shear modulus of the polymer geotextile interface. The mormal stress increases from 50kPa to 150kPa and the shear strength of the polymer geotextile interface increases from 15kPa to 46kPa at the shear rate of 2mm/min. Under the same mormal stress, with the shear rate increases from 1mm/min to 3mm/min, the shear strength and the shear modulus of the fluctuation of two kinds of shear interface only is in a small range. The shear rate has little effect on the friction angle of the polymer geotextile interface under monotonic direct shear condition, which indicates that the shear rate has a little influence on the shear strength and shear modulus of the polymer geotextile interface and the polymer sand interface.