The invention belongs to the field of hot energy collection, and particularly relates to a magnetic-phase change alloy-pyroelectric material-based hot energy collector. The magnetic-phase change alloy-pyroelectric material-based hot energy collector comprises a fixed table, a pyroelectric piece, a magnetic-phase change alloy piece, a permanent magnet, a suspension arm and a heating table, whereinthe fixed table is arranged below one end of the suspension arm, one end of the suspension arm is fixedly arranged on the fixed table, the pyroelectric piece is pasted onto a lower surface of the other end of the suspension arm, the magnetic-phase change alloy piece is pasted to a part below the pyroelectric piece, the heating table is placed below the magnetic-phase change alloy piece, and the permanent magnet is suspended above the pyroelectric piece. The temperature of the pyroelectric material can be instantaneously and substantially changed, and reciprocating motion is achieved by the suspension arm and antiferromagnetic-ferromagnetic phase changing alloy pasted at the tail end of the suspension arm; and meanwhile, the pyroelectric material is pasted onto the alloy piece, the temperature of the pyroelectric material is rapidly changed by the favorable heat conductivity of the alloy, so that conversion from hot energy and electric energy is achieved.