Necessary-accidental causality theory, equivalent causality theory and objective imputation theory are all typical-atypical models. This model forms an internal fit with the common-sense view of criminal law, objectivism of criminal law, and the relationship between retribution and preventiveness, so it is still a research paradigm for the causality of criminal law. However, the typical-atypical model is not only unstable and inaccurate in judgment, but also cannot be applied to the field of accomplices. Abandoning the typical-atypical model is the only way to get out of the quagmire of the uncertainty of result attribution, and it is also the ideological basis for constructing a unified imputation model for single offenders and accomplices.