The invention discloses a method for constructing a resource quantity parameter distribution model. The method comprises the following steps of: a factor construction step, wherein factors corresponding to resource quantity parameters are constructed based on analysis of practical geological conditions, and the factors are mutually independent; a sample value obtaining step, wherein sample values of the factors are obtained based on the practical geological conditions; and a distribution model construction step, wherein corresponding resource quantity parameter values are calculated according to the sample values of the factors, so that the resource quantity parameter distribution model is constructed according to the resource quantity parameter values based on a lognormal distribution formula. The method for constructing the resource quantity parameter distribution model has relatively high operability and calculation precision, and reduces human factor influences in a construction process as far as possible; and the constructed resource quantity parameter distribution model better meets the practical geological conditions.