Abstract: A liquid-leakage detection device includes a detection belt body, an electrode, a first connection member and a second connection member. The detection belt body is configured to wrap an outer surface of a to-be-detected device. The electrode is configured to detect whether the to-be-detected device leaks liquid. The electrode is connected to the detection belt body and disposed on one surface or inside of the detection belt body. The first connection member connected to a first side of the detection belt body and includes at least one first buckling part. The second connection member is connected to a second side of the detection belt body and includes at least one second buckling part. The second buckling part is capable of buckling with the first buckling part so that the first connection member is connected to the second connection member by buckling.