Connector locking device

The utility model belongs to the technical field of pipeline connection, and discloses a connector locking device. The connector locking device comprises a plurality of locking assemblies, a fixing assembly, a connecting assembly and a protection piece. The joint of the two sleeves is sleeved with a connector, the multiple locking assemblies are sequentially arranged in the circumferential direction of the connector, each locking assembly comprises two locking seats, each locking seat comprises a bottom plate and a limiting plate which are connected with each other, and the two bottom plates of each locking assembly are attached to the outer walls of the two sleeves in a one-to-one correspondence mode; the two limiting plates of each locking assembly abut against the two axial ends of the connector respectively. The fixing assembly penetrates through and is connected with the bottom plate and the sleeve, the two locking seats of each locking assembly are connected through the connecting assembly, and the prot