Trolley furnace is a national standard energy-saving periodic operation furnace with ultra-energy-saving structure. It adopts composite fiber insulation, ultra-light and high-strength micro-bead vacuum ball energy-saving bricks. The workpiece hits the brick, the trolley and the furnace door are automatically sealed, and the integrated rail is integrated. It can be used on a level ground without foundation installation. Mainly used for high chromium, high manganese steel castings, gray cast iron, nodular cast iron, rolls, steel balls, crusher hammers, wear-resistant lining quenching, annealing, aging and heat treatment of various mechanical parts.