The utility model discloses a cable joint assembly, include the casing and be located the inside cable joint of casing, the casing is the cylindric, the housing comprises an upper housing body and a lower housing body, go up the casing with the casing is followed down the relative setting and mutual lock of axial tangent plane of casing, just go up the casing with form the assembly chamber with cable joint looks adaptation down between the casing. In assembling the use, the casing that has tubular?structure and lock assembly from top to bottom can provide abundant structure protection for the cable joint of assembly intracavity, avoid cable joint to receive the external environment condition influence, and tubular?structure's structural strength was higher the while, difficult bending, rupture or other damaged phenomenons of taking place, and the structure security is higher.