A vertical long pipe coating device, comprising a vacuum housing (10), a first target frame (20), a second target frame (30), a third target frame (40), and a workpiece frame (50). The vacuum housing (10) is provided with a first cabin door (11), a second cabin door (12), and a third cabin door (13); the first cabin door (11) and the second cabin door (12) are oppositely provided; a vacuum cavity (14) is formed inside the vacuum housing (10); the first target frame (20) and the second target frame (30) are respectively provided on two sides of the first cabin door (11) and the second cabin door (12), and the first target frame (20) and the second target frame (30) can respectively move in a direction close to the vacuum housing (10) to close a first target door and a second target door; sputtering cathodes (90) are provided on the first target frame (20) and the second target frame (30), and the workpiece frame (50) is provided in the third target frame (40). A tubular workpiece (60) is loaded on the workpiece frame (50), and the third target frame (40) enables the workpiece frame (50) to enter into the vacuum cavity (14) by means of the third cabin door (13). The vertical long pipe coating device can effectively improve the coating efficiency of the tubular workpiece.