Inner cavity lining material coating device of aluminum alloy profile

The invention provides an inner cavity lining material coating device of an aluminum alloy profile. The device is characterized by comprising a wire penetration system and a supply system positioned at two ends of the aluminum alloy profile; the wire penetration system comprises the following parts: a motor arranged on a wire penetration system bracket is connected with and drives a wire winding disc to rotate through a speed reducer; a thin rope is wound on the wire winding disc; an air cylinder is opened in the profile direction, and is connected with an air pump; a stepper motor is connected with and drives the air cylinder to flatly move; after the thin rope penetrates through the air cylinder, a guide block is fixed at the tail end of the thin rope; the supply system comprises the following parts: a motor arranged on a supply system bracket is connected with and drives a belt winding disc to rotate through a speed reducer; a water supply belt is wound on the belt winding disc; a supply belt is connected