Abstract: Formwork accounts for a large proportion of concrete construction，in recent years accidents occur frequently on concrete formwork，resulting in greater casualties and property losses． This is not entirely due to improper construction operations，but also related to the unreasonable values in current standards on lateral pressure of concrete formwork． With an engineering project as the background，comparative studying of different formulas at home and abroad is done mainly from the effects of ambient temperature，concrete slump，initial setting time and pouring speed on the lateral pressure of concrete formwork ，which reveals the problems involving calculation of lateral pressure of concrete formwork，in order to arouse attention of the engineering circles．