Flame-retardant plate with positioning parting lines

The utility model discloses a flame-retardant plate with positioning parting lines, which comprises a flame-retardant plate, a plurality of groups of positioning parting lines are arranged on the outer wall of the flame-retardant plate at equal intervals, guide rails are arranged at the upper end and the lower end of the flame-retardant plate, guide sliding blocks are sleeved in the guide rails, and guide blocks are fixed on the two groups of guide sliding blocks. And guide grooves are formed in the guide blocks, a connecting rod is fixedly connected between the two guide blocks, and a pull handle is fixed to the outer wall of the connecting rod. According to the flame-retardant plate cutting device, positioning cutting lines outside a flame-retardant plate are arranged at equal intervals, workers can directly position the cutting position of the flame-retardant plate, during cutting, two sets of guide sliding blocks are inserted into guide rails, then pull handles are pulled to enable connecting rods to driv