The invention discloses a shell-simulating groove liquid lubricating mechanical seal structure in a turtle-back-shaped texture shape. Multiple shell-simulating grooves 4 are evenly distributed in the sealing end face of at least one sealing ring in movable rings or static rings in the circumferential direction, and the appearance structure of the shell-simulating grooves 4 is similar to the shell appearance. Each shell-simulating groove 4 is composed of the texture formed by a radial groove 6, a circumferential groove 5, a shell-simulating appearance groove 42 and a groove in a staggered manner. The radial grooves 6 are distributed in radial rib shape in the fluid leakage direction and are interrupted by the continuously-distributed circumferential grooves 5 to be distributed in a non-continuous manner, and the circumferential grooves 5 are distributed in a concentric arc section shape and are concentric with a sealing ring. The texture refers to the arc turtle-back-shaped protrusions 41 which are equal in height in the radial direction between every two adjacent radial grooves, and the height of the arc turtle-back-shaped protrusions 41 is smaller than that of the sealing end face. Sealing weirs are arranged between the shell-simulating grooves, the downstream sides, leaking in the radial direction, of the shell-simulating grooves are provided with sealing dams 2 having the parking sealing function, and the radial width of the sealing dams is smaller than that of the sealing end face by one second.