The invention relates to a mesh belt drying device which consists of a large frame (7) and is characterized in that a speed reducer and a chain wheel (1) are fixedly connected on the large frame (7), the speed reducer and the chain wheel (1) are movably connected with a conveying chain and a mesh belt (2), an upper circulation fan (3) is fixedly connected inside the large frame (7) and in the middle of the conveying chain and the mesh belt (2), a heat exchanger and a steam pipeline (4) are fixedly arranged in the middle of the conveying chain and the mesh belt (2), a circulation air passage (5) is fixedly arranged at an inlet of the upper circulation fan (3), an air distribution plate (6) is fixedly connected to an outlet of the upper circulation fan (3), a humidity discharging fan (8) and a humidity discharging condenser (11) are fixedly arranged at the top of the large frame (7), one end of a humidity discharging pipeline (9) is fixedly connected between an outlet of the humidity discharging fan (8) and an inlet of the humidity discharging condenser (11), the other end of the humidity discharging pipeline (9) is fixedly connected with a circulation air passage (5) of an outlet of a lower circulation fan (10), and a material inlet (12) is fixedly arranged at the left upper part of the large frame (7), thereby the mesh belt drying device has the advantages of simple structure, small occupied space, high automation level, high heat efficiency, high production efficiency, energy saving and environment protection, reduces the work intensity and is particularly suitable for use in silicone industry.