The present invention belongs to the field of powder metallurgical product, and is gas catalyzing and filtering material and its preparation process. The porous catalyzing and filtering metal material consists of porous metal or alloy matrix, middle transition layer and active component. Its preparation process includes preparing porous metal or alloy matrix, preparing middle transition layer and supporting active component. The porous catalyzing and filtering metal material with porous metal as carrier and transition metal oxide as active component has excellent features of low density, great specific surface area, high porosity, high heat conductivity, etc. as well as homogeneous distribution of active component, fast supporting, high catalytic activity and high heat stability. It has simple preparation process, low cost and easy industrial application, and is suitable for high temperature gas and fume purification.