The invention relates to a 
building material as well as the manufacturing method thereof, in particular to a 
glass fiber reinforced 
gypsum board as well as the manufacturing method thereof. The 
glass fiber reinforced 
gypsum board comprises the components by weight parts as follows: 100 parts of high strength 
gypsum powder, 5 or more than 5 parts of 
glass fiber choppedstrand mat and glass 
fiber lattice cloth, (0.2 to 0.5) percent of water 
reducing agent, (0.1 to 0.5) percent of 
retarder and 30 to 33 parts of water. The manufacturing method comprises the following steps in sequence: batching, 
slurry-mixing, mould-entering and 
casting, finished-product knockout, 
dehydration and 
drying as well as shaping and cleaning. The glass 
fiber reinforced gypsum board has the advantages that the 
distortion is small, the dry / wet 
shrinkage rate is low, the strength is high, the weight is light, no 
odor exists, the board can be degraded for regeneration and utilization, the 
acoustic effect is good, the material surface is fine and clean, the reinforced gypsum board also has fireproof performance, and meanwhile, the manufacturing process is simple, the construction period is short, and the manufacturing cost is low.