Abstract: Based on the unconfined compressive strength test, direct shear test and permeability test, this work studies the basic performance of silt-bentonite-cement kiln dust plastic concrete, a new mixture obtained by replacing cement with cement kiln dust. Results indicate that the unconfined compressive strength is in the ranges of 2.82 - 12.81 MPa and 3.76 - 14.98 MPa at the ages of 14 and 28 days respectively, and that it decreases with the increase in silt content but the drop is not obvious. And it increases significantly with the content of bentonite or cement kiln dust. At 14 days and 28 days, the cohesion is 0.3 - 2.1 MPa and 0.2 - 2.1 MPa respectively and the internal friction angle 23.7° - 55.5° and 20° - 48.5° respectively. When the content of silt, bentonite, or cement kiln dust increases, the cohesion increases while the internal friction angle decreases. The permeability coefficient is 1.79×10-8 - 1.62×10-7 m/s and 1.01×10-8 - 1.54×10-7 m/s at 14 days and 28 days respectively, and it decreases with the content of silt, bentonite, or cement kiln dust. For this new mixture, a suitable content of silt, bentonite or cement kiln dust is thought to be 15%.