Blocking and protecting structure for inner and outer sheet-pile walls in abrupt slope terrain and construction method

The invention provides an abrupt slope terrain inner and outer pile-slab wall retaining and protecting structure which comprises an anti-slide pile body, the anti-slide pile body comprises multiple sets of inner anti-slide piles evenly distributed on the side close to a mountain and multiple sets of outer anti-slide piles evenly distributed on the side away from the mountain, and the multiple sets of inner anti-slide piles correspond to the multiple sets of outer anti-slide piles; the two sets of inter-pile baffles are located between the multiple sets of inner anti-slide piles and the multiple sets of outer anti-slide piles and abut against the multiple sets of inner anti-slide piles and the multiple sets of outer anti-slide piles correspondingly; the multiple sets of greening tables are evenly distributed between every two outer anti-slide piles, and at least two sets of greening tables are evenly distributed between every two outer anti-slide piles. Mountains on the two sides of a tunnel are supported thro