Mechanical sealing device convenient and rapid to disassemble and assemble and using method thereof

The invention discloses a mechanical sealing device convenient and fast to disassemble and assemble and a using method thereof, and relates to the technical field of bearing sealing. The mechanical sealing device comprises a bearing seat, sealing cover structures are arranged on the left side and the right side of the bearing seat correspondingly, side sealing covers are fixedly connected to the sides, away from the bearing seat, of the sealing cover structures, and two bearing parts are arranged on the inner side of the bearing seat; a sealing structure is arranged between the bearing seat and the sealing cover structure, a lubricating structure is arranged on the inner side of the side sealing cover, an installation positioning structure is arranged on the bottom side of the bearing seat, and an oil lubricating groove is formed in the inner wall of the bearing seat. The sealing cover structure comprises bearing covers, the bearing covers are arranged on the left side and the right side of the bearing seat,