The invention discloses a grid-shaped steel-concrete combined long-service-life pavement slab structure. The structure comprises multiple rows of steel-concrete combined pavement slabs which are distributed in the longitudinal extension direction of a road, wherein a transverse expansion joint is formed between every two adjacent steel-concrete combined pavement slabs; the steel-concrete combined pavement slabs are connected through multiple longitudinal dowel bars; each row of the steel-concrete combined pavement slabs is formed by splicing multiple rectangular pavement slabs; a longitudinal expansion joint is arranged between every two adjacent rectangular pavement slabs; the pavement slabs are connected through multiple transverse dowel bars; two ends of each longitudinal dowel bar are respectively fixed inside two front and back adjacent rectangular pavement slabs; two ends of the transverse dowel bar are respectively fixed inside two left and right adjacent rectangular pavement slabs; each rectangular pavement slab comprises a grid-shaped framework and a concrete pouring structure which is poured inside the grid-shaped framework and is made of concrete. The pavement slab structure is simple, reasonable in design, convenient in construction and good in use effect, and the problems that an existing pavement is easy to deform and damage and is short in service life and the like can be solved.