The invention relates to a tungsten/molybdenum rounded rectangle crucible for a high-temperature heating furnace and a manufacturing method of the tungsten/molybdenum rounded rectangle crucible. The crucible is a rounded rectangle crucible without a bottom or a cover and is formed by defining two opposite frame type circular bead end plates and at least two side plates, vertical joints between connecting plates are in riveting connection, and each vertical joint is provided with at least four riveting points which are evenly distributed. The tungsten/molybdenum crucible is good in structural stability and meets the requirement for high-temperature heating of the high-temperature heating furnace. The invention further discloses the manufacturing method of the tungsten/molybdenum crucible for the high-temperature heating furnace, materials are saved, and cost is low.