The utility model discloses an adjustable thick film heater of regular length, including thick film heater and lower U type apron, thick film heater includes thick film heating plate and thick film heating plate down, goes up thick film heating plate and sets up on thick film heating plate down, is equipped with U type apron on the lower U type apron, goes up thick film heating plate and be the free end with thick film heating plate 's one end down, and the other end setting of going up thick film heating plate and thick film heating plate down is between the tip that the U type was lapped and last U type is lapped down, and the tip that lower U type was lapped and last U type is lapped is equipped with the side cap board, go up U type apron and be equipped with the lead plate down between the U type apron, the tip and the last thick film heating plate of lead plate are connected, go up thick film heating plate and pass through wire series with lower thick film heating plate, go up thick film heating plate and be equipped with the insulating piece down between the thick film heating plate. The utility model discloses an electrical heating is realized to the lead plate, can conveniently carry out direct electric heating processing, supplementary welding operation to sending out metalworks such as orchid.