The invention discloses a construction method for a concrete slab pavement structure for river and sea reclamation district sloping dikes. The method comprises the following steps of a, excavating a slope foundation; b, determining a paving area; c, manufacturing a pavement support; d, mounting a first concrete slab pavement plate; e, mounting a second concrete slab pavement plate; f, mounting theconcrete slab pavement structure in the paving area; g, maintaining the concrete slab pavement structure; and h, carrying out earthwork backfilling. According to the construction method, the protecting effect of the constructed structure is better than the protecting effect of a concrete structure, and the environmental influence is small; in the transportation process, the structure can be prevented from being damaged; and in construction, the damaged first concrete slab pavement plate and the damaged second concrete slab pavement plate can be quickly replaced, so that the integrity of the concrete slab pavement structure can be improved, meanwhile, the construction efficiency can be improved, the deposition and displacement phenomena of the concrete slab pavement structure in construction can be avoided, and in addition, the ecological development can be promoted.