This paper deals with some model and possibility of enriching mineralization of metallogenic material of post-magmatic mineral deposit in process of magmatic action with the method of mathematics and physics, such as crystal separation, swelling separation, gaseous state separation. This research deduces the following conclusions: ①The forming process of post-magmatic mineral deposit is that the material of mineralization separated from the magma in the way of gaseous state and enriched on the juvenile top. It is the mineralization principle of post-magmatic mineral deposits. ②The post-magmatic mineral deposites must form in the ring-shaped structures, but not all ring-shaped structures could control ore deposit. Only in those ring-shaped structures which form metallogenic gaseous material blasting, simultaneously, in which the rising height of metallogenic material is equal to the height difference between the magmatic source top and the crust surface, the post-magmatic mineral deposit can be found hopefully.