The invention provides special awning glue and a preparation method thereof. The special awning glue comprises in parts by weight, 250-350 parts of polyamine polyol (with molecular weight 3000), 150-250 parts of polyamine polyol (with molecular weight 2000), 30-50 parts of isocyanate, 5-15 parts of multi-isocyanic acid, 0.5-1.5 parts of catalysts, 2-2.5 parts of terminating agents, 80-120 parts of methylbenzene, 80-120 parts of methyl ester, 150-250 parts of ethyl ester, 450-550 parts of dimethyl carbonate and 150-250 parts of cyclohexanone. The special awning glue is non-toxic, environmentally friendly and rapid in positioning, does not need heating after gluing, can be naturally cured at normal temperature, can achieve pretty good strength after five minutes, never falls off after gluing in terms of sewing, side removing, positioning or leftover material reuse, can resist heat of 100 DEG C or more, cannot come apart at 30 DEG C below zero, and has ultra-strong performances such as falling resistance and corrosion resistance.