Energy-saving box type muffle furnace

The utility model discloses an energy-saving box type muffle furnace which comprises a box body (1), a hearth cavity (2) is arranged in the box body (1), a hearth cover (3) is arranged on the front face of the hearth cavity (2), an electric heating piece (4) is arranged on the top wall of the hearth cavity (2), a base (5) is arranged on the bottom face of the hearth cavity (2), air vents (6) are formed in the two sides of the hearth cavity (2), opening and closing plates (7) are arranged on the inner sides of the air vents (6), and opening and closing driving assemblies (8) are arranged between the opening and closing plates (7) and the hearth cavity (2). A waste heat recovery heat preservation box (9) is further arranged in the box body (1), the two ends of the waste heat recovery heat preservation box (9) are connected with the ventilation openings (6) through gas conveying pipes (10) respectively, and an exhaust fan (11) is arranged on one gas conveying pipe (10). The utility model has the characteristic t