The invention relates to the technical field of Internet, in particular to a network storage device for multi-terminal synchronization. Comprising a network memory; the network memory comprises a cylindrical shell, a PCB mainboard and a plurality of hard disks; a connecting plug is detachably arranged on one side of each hard disk; a front panel is fixedly arranged on one side of the cylindrical shell; a through hole is formed in one side of the front panel; a U-shaped sliding frame is slidably connected to the inner side of the through hole. A guide limiting device is arranged on one side of the U-shaped sliding frame; and a push-pull plate is fixedly arranged on one side of the U-shaped sliding frame. Through the arrangement of the U-shaped sliding frame, the push-pull plate positioning bottom frame, the pressing frame, the fixing box, the bevel edge clamping head, the U-shaped connecting frame, the T-shaped connecting frame, the tension spring, the storage battery, the CPU module, the power failure prompting module and the charging module, the invention can have the functions of rapid installation, rapid disassembly, poor contact prevention, backup, power failure prevention, power failure prompting and the like, and have high reliability.