Pollution caused by crude oil has become a major problem in Nigeria. It is dangerous to human health, fueling climate change, poisoning soil dwelling organisms amongst others. However, physical and chemical approaches for its remediation are in use but most of these methods are less-effective, costly and even non-environmentally friendly. In this research, magnetite-magnesium sulphate- sodium dodecyl sulphate clay composite that is eco-friendly and less expensive were synthesized, characterized and applied in remediation of crude oil polluted soil. Magnetite was synthesized by co-precipitation of ferric and ferrous Sulphate. Magnesium Sulphate was prepared by recrystallization of Epsom salt and SDS clay was prepared by dissolving 0.6g of SDS in 250ml of distilled water which was further homogenized with calcined clay. Characterization of the composite and constituents were done using the following techniques; XRD, FTIR, XRF and SEM for the determination of mineral structure, functional groups, elemental composition and surface morphology respectively. In remediation, varying concentrations of the composite were added to fixed amount of the polluted soil sample. i.e 0%, 2%, 4%, 6%, 8% and 10% to 10g of soil sample. The remediation was conducted within the period of 7 and 14 days on parameters of interest such as Benzene, Toluene, Ethylbenzene and Zylene (BTEX), Polycyclic Aromatic Hydrocarbons (PAHs), Total Petroleum Hydrocarbons (TPHs) and the soil samples were further, analyzed using GC-MS for the determination of BTEX and PAHs while GC-FID for TPHs before and after treatment with the composite. XRD results showed mixed mineral compounds of Silica, MgSO4, Alumina and Fe3O4 as expected. FTIR results showed prominent bands at 872cm-1 for bending mode of Si-O-Si group in the composite, 1028cm-1 for Si-O-Al group in the SDS clay, 864 cm-1 for bending vibration of SO42- in Magnesium Sulphate and 582 cm-1 for Fe-O group in Magnetite. EDXRF results showed Fe2O3, SiO2, MgO as significant elemental composition in the composite. SO3, MgO, Al2O3 as significant elemental oxides in Magnesium Sulphate, Fe2SO3 in Magnetite and SiO2, Al2O3, CeO2 in SDS clay. The results of SEM micrographs showed apparently porous, platy and irregular sized polycrystallites. BTEX, PAHs and TPHs analysis in 7 and 14 days remediation showed decreased in concentration of pollutants as the concentration of composite increases from 2% to 10%. The efficiency of degradation of BTEX, PAHs and TPHs was found to be higher in 14 days remediation compared with 7 days. Moreover, above 91% was recorded on PAHs and TPHs while 100% was achieved on BTEX. The order of magnitude of degradation by the three constituents of the composite on BTEX, PAHs and TPHs pollutants in the soil sample was SDS clay>MgSO4>Fe3O4. Above all, the efficiency of degradation of BTEX, PAHs, and TPHs increases due to increase in concentration of the composite with respect to time.