Spoiler assembly of hatchback cars

The invention discloses a spoiler assembly of hatchback cars. The spoiler assembly of hatchback cars comprises a spoiler body and a positioning pin arranged at the middle part of the back of the spoiler body; the spoiler assembly is characterized in that four waterproof fastener seats are arranged in symmetric distribution at the middle part of the back of the spoiler body, four plastic waterproof fasteners are respectively fitted with the four waterproof fastener seats; three mounting bolts are arranged on the back of the spoiler body; one of the mounting bolts is arranged at the lower middle part of the back of the spoiler body, and the rest two mounting bolts are respectively arranged at two end parts of the back of the spoiler body; and the positioning pin, the four waterproof fastener seats and three mounting bolts are integrally formed with the spoiler body. The spoiler assembly disclosed by the invention improves the wind noise effect of the whole vehicle; formed by blow molding, the spoiler overcomes the shortage that the spoiler is deformed easily; and the embedded bolts and fastener seats of the spoiler, and the structure of waterproof fasteners and waterproof foams have a waterproof function, so that rainwater is effectively prevented from leaking.