The Arabic term "Sabkha" refers to salt-encrusted plains that lie beneath sand, silt or clay soil. Sabkha is distributed in many areas in Oman, such as the coast of Batina, Ash Sharqyah, Al Wusta and Ad Dhahirah, Umm Samim and Barr Al-Hikman. Owing to the high salt content level of sabkha soil, geotechnical problems appear, including low shear strength, primary and secondary settlement, corrosion, crystallized salt heaving, and flood problems for low rates of infiltration. This research aimes to investigate the use of marble waste powder for stabilizing Sabkha soils. The samples of sabkha soil (SB) were collected from Al-Azaiba-Muscat, Sultanate of Oman. An experimental program has been performed to identify the essential characteristics of the collected soil, along with its physical, geotechnical, and chemical properties. Soil samples were treated with cement (C) as a control binder and with cement marble waste (MPC) mix at ratios 0/100, 20/80 and 40/60%. Binders were supplemental to the soil at proportions of 0, 2.5, 5, 7.5, and 10% by dry weight. In addition to physical and chemical properties, unconfined compressive strength (UCS), California Bearing Ratio (CBR) , Scanning Electron Microscope (SEM) , Energy Dispersive Spectroscopy (EDS) , and X-Ray Fluorescence (XRF) were conducted for all treated samples. The main findings indicate that the UCS and CBR of treated sabkha with 20% waste marble powder is higher than sabkha treated with cement. This, due to the good properties of cementitious materials and microfiller of waste marble powder. In addition, According with the Unified Facilities Criteria (Department of Defense USA, 2004), the Federal Highway Administration (FHWA) (2013), the Mechanistic-Empirical Pavement Design Guide (MEPDG, 2004), and the Indian Road Congress, New Delhi (IRC 37, 2012), sabkha treated by 5% of binder that contained 20% waste marble powder, could be used as a subgrade course and subase layers. According to the Texas Department of Transportation (2019) and the Portland Cement Association (1992), sabkha treated by 5% of binder that contained 40% waste marble powder could be used for cement-treated sub base layer. According to the Omani Highway Design Standard, all treated sabkha can be used for embankment. Also, sabkha treated by 5% of binder that contained 40% and 20% waste marble powder, treated sabkha with 7.5% of binder that contained 40% and 20% waste marble powder and treated sabkha with 10% of binder that contained 40% and 20% waste marble powder can be used for a drainage layers. Moreover, 5% of binder that contained 20% waste marble powder and 10% of binder that contained 40% and 20% waste marble powder can be used for subbase.