Multi-branch cable joint and multi-branch cable

The multi-branch cable connector comprises a connector assembly, the connector assembly comprises a main fixing piece and an auxiliary fixing piece matched with the main fixing piece, sealing structures are arranged on the sides, away from each other, of the main fixing piece and the auxiliary fixing piece, and each sealing structure comprises a sealing cap. A through hole is formed in one end of the sealing cap, an inserting cylinder extending out of the through hole is constructed on one side in the sealing cap, an outer thread ring is constructed on the side, facing the auxiliary fixing piece, of the main fixing piece, an inner thread for threaded installation of the outer thread ring is formed in the auxiliary fixing piece, and the outer edge face of the outer thread ring is sleeved with a sealing gasket; the two sides of the sealing washer abut against the main fixing piece and the auxiliary fixing piece respectively. The number of the multi-branch cables is two. The multi-branch cable joint and the mult