The disclosure provides an easy-to-mount leakage detection sleeve configured to be mounted on a tube. The easy-to-mount leakage detection sleeve includes a flexible water absorbing layer, a plurality of electrically conductive wires and a connecting assembly. The plurality of electrically conductive wires are disposed on the flexible water absorbing layer and spaced apart from each other. The connecting assembly includes a first connecting part and a second connecting part. The first connecting part and the second connecting part are respectively disposed on two opposite sides of the flexible water absorbing layer, and the second connecting part is detachably engaged with the first connecting part so that the flexible water absorbing layer forms a tube accommodation space configured for accommodating the tube.