Temperature is an important factor that affects properties of oil contaminated soil. This study considered the special characteristics of the climate environment in the coastal area and used unconfined compressive strength and stress-strain distribution to optimize the requirement for two kinds of ash solidified materials

and the temperature sensitivity was used as an evaluation criterion. Results indicate that the compressive strength of the oil contaminated soil significantly fluctuates

and it is up to two times in the temperature range of -20?40 °C. However

the fluctuation reduces to 10%?20% after soil solidification with two kinds of ash. Solidified materials can adsorb and enclose the temperature sensitive substances (oil

water and salt) in the gel body and even outside

and then it can enhance the resistance to the variation of environmental temperature. The unconfined compressive strengths of oil contaminated soil and solidified soil decrease first and then increase with the increasing of temperature

and 10 °C is the turning point

which is the lowest point. The results suggest that this temperature should be of particular concern in practical engineering. Under the action of temperature

the failure mode of solidified oil contaminated soil is strain-softening. With the increase of temperature and the contaminated level

the plastic deformation stage is prolonged

and the axial strain gradually increases. Finally

the surrounding layered damage occurs. The contaminated level of soil itself affects the solidified effect

and the fluctuation of compressive strength under a high level of contamination is about 40%. Therefore

in actual engineering

the solidified requirement should be adjusted according to the contaminated level. As to the soil with low contamination

the solidified requirement is only slightly higher than that of the uncontaminated soil

and too much solidification for the soil with low contamination is often counterproductive. Lime has more contribution than fly ash to soil stability under the same additive to soil ratio. As to the oil-contaminated saline soil with 6% contamination

the optional solidified condition is 10% lime +20% fly ash.