This paper reports that hydrocarbon inclusions were found in halite of salt rocks from the Dongying depression, east of China. Hydrocarbon inclusions in halite indicate that the sealing capacity of salt rocks may be lost under special condition, oil and gas can migrate though them. The micro thermometry shows that the homogenization temperatures of aqueous inclusions in halite are not reliable because the volume of inclusions will change during heating. The change of volume was caused by two aspects, including difference between trapping pressure and pressure in lab, solubility of halite increasing with temperature. But the hydrocarbon inclusions can avoid the effect of solution, their homogenization temperatures are more reliable comparing to aqueous inclusions. Based on analysis of hydrocarbon inclusions in halite, we speculate that two activities stages of hydrocarbon fluid related to deformation of salt rock appeared in Dongying depression. The first stage was Dongying period, and the second one was Minghuzhen period, which were similar to stages of oil accumulation in Dongying depression. Fluids play an important role in salt grains moving and deformation of salt rocks. Recrystallization and fluid inclusions in halite are direct evidences for fluids activities. There are some key problems should be understood including where the fluids in halite came from and went, stages of fluids activities, the temperature and pressure of deformation under fluids adding. The answers of these questions are helpful to know how the salt rocks control accumulation oil and gas in hydrocarbon bearing basins.