在部分子概念上提出了一种关于核子结构函数的统一理论描述。由此，包括小布约肯变量ｘ范围的遮蔽、反遮蔽，中等ｘ范围及大ｘ范围的ＥＭＣ效应的全部特征都可以给出解释。指出了深度非弹散射现象中部分子图象与传统核理论Ｎ一π图象的关联。理论计算结果与最近实验数据很好的符合。 In the part of sub-concept proposed a unified description of the nuclear structure function theory. Thus, all the features of the EMC effect including the masking, anti-masking, medium x range and large x range of the Bjøbjörn variable x range can be explained. The relationship between the partial sub-image of the deep non-elastic scattering phenomenon and the N-π image of the traditional nuclear theory is pointed out. The theoretical calculation results are in good agreement with the recent experimental data.