The bayonet-type heating element comprises more than two porcelains which are sequentially strung on a steel bar, wherein a first porcelain is provided with a wiring bar, a resistance band is winded between the first porcelain and a second porcelain; one end of the resistance band is connected with the wiring bar through the first porcelain, and the other end of the resistance band sequentially passes through other porcelains; the porcelains are round and each is provided with a square hole; and the resistance band is winded forming a cylinder. The beneficial effects of the utility model are that, bayonet-type heating elements are connected in parallel so as to ensure that while in use, if a bayonet-type heating element is damaged, the user can directly pull out the damaged element without blowing out the furnace, and a new element is directly inserted into the equipment for use; and the design facilitates the operation of the user, and effectively helps to complete the production.

Advantage and the good effect that the utlity model has are: owing to adopt technique scheme, can the resistive band and the external radiation pipe that twine is isolated, effectively avoided short circuit phenomenon.Simultaneously, the bayonet type heating element all is directly to be inserted into inside by the body of heater outside, and the hold-down mechanism by outside disk is fastened on the body of heater outside with it again.And parallel form is all adopted in the connection between every group, need to change even so just can guarantee in use to have a heating element to damage, the user also can directly extract the element that damages without blowing out, new element is directly inserted back in the equipment and can use, such design is not only convenient for users, simultaneously the more effective output of finishing also.