As the amount of radioactive waste increased sharply, the safely final disposal method of radioactive waste was being researched, to ensure that the radioactive waste was reserved safely in a long term. According to the research of each country, the mechanical behavior of rocksalt, such as creep, osmosis, mechanical behavior of radiation shield and thermal expansion of brine, was discussed. And then, the primary influencing factors of rocksalt cavern stability, such as obliquity of rocksalt, stress-strain of rocksalt, geometrical shape of rocksalt cavern and cavern roof stabilization, were analyzed. It is concluded that radioactive waste disposal in rocksalt cavern is safe and has well prospects of application.