By report, in recent times, Daqing Area, Heilongjiang Province, China ushered continuous rain weather, hot and humid environment makes mushrooms grow quickly, one of which is a “Super big mushroom”. According to observation and measurement, this “Super big mushroom” is shaped like floret umbrella, the height is about 32cm and the diameter is about 11cm. Many citizens are curious about it. Relevant expert explained that actually it is Coprinus comatus and it is inedible considering its growing condition. In addition, expert also indicated that the annual July to August is the high-incidence season of wild mushroom poisoning. poisoned mushrooms have numerous varieties and large differences of virulence, it is hard even for professional experts to distinguish sometimes, so, it is better for citizens not to eat wild mushrooms in order to prevent poisoning.