Drying equipment

The utility model discloses drying equipment which comprises at least one section of drying oven and an external circulation system for providing hot air to the inside of the drying oven, the external circulation system comprises a heating device, an air inlet pipe and a linkage air brake, and the air inlet pipe comprises a high-temperature air pipe and a low-temperature air pipe. An outlet of the high-temperature air pipe and an outlet of the low-temperature air pipe are connected to a drying oven through the linkage air brake, an inlet of the high-temperature air pipe and an inlet of the low-temperature air pipe are communicated with outside air through a fan, and the heating device is arranged on a pipeline of the high-temperature air pipe. The air volume ratio of the high-temperature air pipe to the low-temperature air pipe can be controlled by adjusting the linkage air brake, the drying oven can achieve the temperature adjusting function, adjustment is easy and convenient, and the temperature control pre