The present invention relates to building tile produced with flyash and shale as main material. The materials including shale 60-80 wt%, flyash 10-30 wt% and coal slurry 5-25 wt% are crushed and mixed, the mixture is produced into tile adobe, and the tile adobe is sintered at temperature over 900 deg.c to produce shale tile. It is preferably to stoving tile adobe at 30-120 deg.c for 12 hr before sintering. The shale may be calcium shale, silicon shale or carbon shale. The product is pink tile for roofing with high bearing strength, long service life, low hydroscopicity and high cold resistance.