The invention discloses a baffle plate device for slab stacking of an artificial board continuous production line. The baffle plate device comprises a board stacking rack, a plurality of slab prestoring plates, a first conveying rack and a second conveying rack, wherein the first conveying rack and the second conveying rack are arranged on the two sides, corresponding to the board stacking rack, on the ground separately; lifting sliding rails are formed in the two opposite side surfaces of the inner side of the board stacking rack; lifting sliding blocks are arranged on the two sides of the slab prestoring plates; the plurality of slab prestoring plates are connected with the lifting sliding rails through the lifting sliding blocks on the two sides; and the ends, positioned on the first conveying rack, of the upper surfaces of the slab prestoring plates, are provided with baffle plate lifting grooves. According to the baffle plate device, the plurality of slab prestoring plates are designed on the board stacking rack, so that a plurality of slabs can be prestored on the board stacking rack, conveying pressure of conveyer belts is greatly relieved, and processing requirements of theproduction line can be met; and besides, baffle plate structures are added on all the slab prestoring plates, and slabs are accurately stacked on the slab prestoring plates.