The throttling performance of columnar metal rubber throttling porous elements is researched in this paper. Based on Darcy theory, the Reynolds coefficient, the volume flux and the calculation expression of loss factor are obtained. The filtration coefficient which is the most important parameter affecting the filtration performance of MR elements is derived. The calculation equation of porosity, the minimal porosity and the equivalent pore diameter of MR are investigated. It is concluded that the filtratio...