Floating-roof oil tank rubber sealing belt indentation marking device and using method thereof

The invention discloses a floating-roof oil tank rubber sealing belt indentation marking device and a using method thereof.The floating-roof oil tank rubber sealing belt indentation marking device comprises a base, a wire outlet roller used for containing a rubber sealing belt and a winding roller used for collecting the rubber sealing belt on the wire outlet roller are arranged at the two ends of the base respectively, and the base is provided with an indentation marking device body. And a rotatable circular plate is arranged between the wire outlet roller and the winding roller. When the limiting block abuts against the blocking column, the two pressing blocks get close to each other, the acute-angle-shaped sides of the two pressing blocks are pressed to the two sides of the rubber sealing belt correspondingly, so that indentation marks are left on the rubber sealing belt, the two pressing blocks are expanded again under the elastic force action of the spring column when the limiting block does not abut aga