A cable adaptor assembly of an electrical box having an electrical box body , comprising: a sealing plate (1-1), and at least one waterproof terminal; the at least one waterproof terminal comprising: a clamping claw (1-2), a clamping nut (1-4), and a terminal body (1-1-5);wherein an outer wall of the terminal body (1-1-5) is provided with an external thread (1-1-1) connected with the clamping nut (1-4), and the terminal body (1-1-5) and the clamping nut (1-4) are sleeved outside of the clamping claw (1-2), the terminal body (1-1-5) and the sealing plate (1-1) have an integrated structure, characterized in that , a main plate surface of the sealing plate (1-1) is convexly arranged, at least two annular grooves (1-1-3), arranged circumferentially, are provided at a junction of an edge of the sealing plate (1-1) and the main plate surface of the sealing plate, the edge is configured to fixedly connect to the electronic box body by a fastener, the at least two annular grooves (1-1-3) are each configured to install a corresponding sealing strip , each sealing strip is connected end to end, and the at least two adjacent annular grooves are arranged concentrically. a sealing plate (1-1), and at least one waterproof terminal; the at least one waterproof terminal comprising: a clamping claw (1-2), a clamping nut (1-4), and a terminal body (1-1-5);wherein an outer wall of the terminal body (1-1-5) is provided with an external thread (1-1-1) connected with the clamping nut (1-4), and the terminal body (1-1-5) and the clamping nut (1-4) are sleeved outside of the clamping claw (1-2), the terminal body (1-1-5) and the sealing plate (1-1) have an integrated structure, characterized in that , a main plate surface of the sealing plate (1-1) is convexly arranged, at least two annular grooves (1-1-3), arranged circumferentially, are provided at a junction of an edge of the sealing plate (1-1) and the main plate surface of the sealing plate, the edge is configured to fixedly connect to the electronic box body by a fastener, the at least two annular grooves (1-1-3) are each configured to install a corresponding sealing strip , each sealing strip is connected end to end, and the at least two adjacent annular grooves are arranged concentrically. a clamping claw (1-2), a clamping nut (1-4), and a terminal body (1-1-5);wherein an outer wall of the terminal body (1-1-5) is provided with an external thread (1-1-1) connected with the clamping nut (1-4), and the terminal body (1-1-5) and the clamping nut (1-4) are sleeved outside of the clamping claw (1-2), the terminal body (1-1-5) and the sealing plate (1-1) have an integrated structure, characterized in that , a main plate surface of the sealing plate (1-1) is convexly arranged, at least two annular grooves (1-1-3), arranged circumferentially, are provided at a junction of an edge of the sealing plate (1-1) and the main plate surface of the sealing plate, the edge is configured to fixedly connect to the electronic box body by a fastener, the at least two annular grooves (1-1-3) are each configured to install a corresponding sealing strip , each sealing strip is connected end to end, and the at least two adjacent annular grooves are arranged concentrically. <EOS>