Foamed polyolefin composite material and preparation method thereof

The invention belongs to the technical field of polymer composite materials, and particularly relates to a foamed polyolefin composite material and a preparation method thereof. Comprising powder A and powder B. During foaming, the powder A and the powder B are mixed according to the mass ratio of 1: 1, and the powder A is prepared from, by mass, 60-95 parts of polyethylene resin, 5-40 parts of polypropylene resin, 5-20 parts of epoxy resin, 2-10 parts of a foaming agent, 1-20 parts of an inorganic reinforcing agent, 0.5-3 parts of a lubricating agent, 0.5-3 parts of a dispersing agent, 0.5-3 parts of a coupling agent and 0.1-0.5 part of an antioxidant; the powder material B comprises the following components in parts by mass: 100 parts of polyethylene resin, 2-10 parts of a curing agent and 0.1-0.5 part of an antioxidant; the invention also provides a preparation method thereof. The composite material disclosed by the invention can adapt to die pressure-free forming foaming of products in various shapes, and