The invention relates to a combined embedment type safety refuge device applicable to public places. The device comprises a main body, closed doors, a storage battery, an oxygen supply self-control device, a cabin pressure regulating and controlling device, an in-cabin gas parameter detection system, an air purification system, a phase-changed refrigeration system and a control console, wherein the main body is in a honeycomb structure consisting of seven cabins and has the advantages of high structural strength and compact connection, meanwhile, underground space is effectively utilized, and the utilization rate of over-ground space is increased; when disaster happens, multiple safety emergency refuge devices are fixedly connected, so that search-and-rescue time of rescue personnel is saved; even though a single unit is split to a separate position in the disaster environment, life safety of escape people in the cabin can be guaranteed; tight locking of the explosion-proof closed doors is realized through simultaneous operation of a large number of extension bars, self-locking is completed through profile connection in self-locking devices, and reliable connection during explosion impact or falling impact is guaranteed accordingly.