Tubular furnace with multiple temperature zones

According to the technical scheme, the multi-temperature-zone tubular furnace is characterized by comprising a horizontally-arranged material pipe, a plurality of heating furnaces used for heating the material pipe and temperature control devices in one-to-one correspondence with the heating furnaces; the multiple heating furnaces are horizontally arranged and connected together, the temperature of each heating furnace is regulated and controlled through the corresponding temperature control device, and the material pipes are inserted into the multiple heating furnaces at the same time. According to the utility model, the heating part of the tubular furnace is divided into a plurality of heating furnaces of which the temperature is controlled by a plurality of temperature control devices, and the heating furnaces corresponding to different temperature control devices are set to be at different temperatures by controlling different temperature control devices, so that multi-temperature-zone heating of a materi