Typomorphic characteristics of mineral crystal form are widely used in the genetic study of mineral deposits and metallogenic prognosis. It is a very important research direction of genetic mineralogy. Taking the pyrite crystal as an example in this paper, the authors introduce three statistical methods of mineral crystal forms. The first one is for simple crystal forms called Form Statistical Method. The second is for complex crystal forms called Habit Statistical Method. And the last is an improved one called Weight Statistical Method. Comparing the three methods, the authors point out the advantages, disadvantages and put forward some suggestions that selection of the methods should be based on different research purposes and the situations of samples.