Method and device for determining characteristic engineering variable

The invention discloses a method and a device for determining a characteristic engineering variable. The method comprises the following steps that: obtaining a characteristic variable dataset used formachine learning, wherein the characteristic variable dataset contains different types of various characteristic variables; on the basis of a preset rule, independently carrying out derivation on each type of characteristic variable to obtain an expanded dataset of which the characteristic variable is expanded; and screening the characteristic variables from the expanded dataset to be combined toobtain a characteristic variable combination used for machine learning. By use of the method, the interpretability of the characteristic variable is enhanced, information contained in the characteristic variable is enriched, so that the characteristic variables are screened from the expanded dataset to be combined to obtain the characteristic variable combination used for machine learning, rich data information with bette