The invention discloses a porous hydrogen absorption element and a mounting method of the porous hydrogen absorption element in a solar heat collection pipe. The porous hydrogen absorption element comprises a container with holes and hydrogen absorption material particles, wherein the container is filled with the hydrogen absorption material particles; the minimum particle diameter of the hydrogen absorption material particles is larger than the filtering precision of the holes of the container; and the mounting method of the porous hydrogen absorption element in the solar heat collection pipe comprises the steps that a contact piece which is welded with a corrugated pipe at the end of the heat collection pipe is welded to the edge of a sealing cover of the hydrogen absorption element, the hydrogen absorption element is wholly placed in a vacuum interlayer, the contact piece at the edge of an end cover of the hydrogen absorption element is in contact with the inner wall of the corrugated pipe, the hydrogen absorption element does not make contact with the corrugated pipe on the outer side and an inner pipe on the inner side, and meanwhile the mounting position of the hydrogen absorption element is not exposed out of the corrugated pipe on the outer side; and according to the hydrogen absorption element, the hydrogen absorption performance of the hydrogen absorption material can be fully developed, and meanwhile falling off of the hydrogen absorption material particles can be avoided. The hydrogen absorption element is used for the solar heat collection pipe, and works at the lower temperature, the hydrogen absorption capacity is ensured, and meanwhile the higher hydrogen absorption power property is achieved.