In this part , firstly , the writer expounds the double layers mode - the cause in fact and the cause in law and the theories of the causalities ; secondly , the writer analyses the legislation of mpc of u . s . a , and points out the legislation of the double layers cause and the regulations of the causality from objective side , the limitation from the subjective side have scientific value , which theoretical research on the criminal law causality in our country can use for reference 該部分首先介紹了英美法系因果關系研究的雙層模式? ?事實和法律原因和英美法系因果關系的學說;其次,對美國《模范刑法典》因果關系立法予以分析,指出其雙層次原因的立法以及從客觀面對因果關系的規定、從主觀面對因果關系限定很有科學性,對我國刑法因果關系的理論研究與立法具有借鑒意義。