Field effect transistor convenient to weld

The utility model relates to the technical field of field-effect tubes, in particular to a field-effect tube convenient to weld, which comprises a field-effect crystallization tube, a cover body is inserted on the field-effect crystallization tube, a fixing mechanism is arranged in the field-effect crystallization tube, an adjusting mechanism is arranged at the bottom end of the field-effect crystallization tube, a drain electrode is arranged at the bottom end of the adjusting mechanism, and a slot is arranged on the inner wall of the cover body. According to the utility model, through the arrangement of the fixing mechanism, the purpose of conveniently assembling and disassembling the cover body is achieved, the maintenance of the inside of the effect crystallization tube is facilitated, and through the arrangement of the adjusting mechanism, the purpose of conveniently adjusting the length of the drain electrode is achieved, and the welding of the field effect tube is facilitated. 本实用新型涉及场效应管技术领域，具体为一种便于焊接的