NOVELTY - A vacuum heat collecting element production method of necking cover glass pipe inserted in heat pipe involves producing heat transfer necking section on cover glass pipe, inserting heat pipe in cover glass pipe, connecting and assembling cold end of heat pipe with heat transfer necking section by low heat resistance, and finishing other processing of cover glass pipe.    USE - A vacuum heat collecting element production method of necking cover glass pipe inserted in heat pipe.    ADVANTAGE - The method saves material, uses simple equipment, and improves heat collecting efficiency.    DETAILED DESCRIPTION - A vacuum heat collecting element production method of necking cover glass pipe inserted in heat pipe involves producing heat transfer necking section on cover glass pipe, inserting heat pipe in cover glass pipe, connecting and assembling cold end of heat pipe with heat transfer necking section by low heat resistance, and finishing other processing of cover glass pipe. The heat pipe includes glass heat pipe which has adsorbing body fin plate on hot end, and metal heat pipe welded with heat transfer material on cold end. The cover glass pipe processing method involves drawing or fusing heat transfer necking section on cover glass pipe and assembling with cold end of heat pipe inside, equipping cover glass pipe with heat pipe bracket and degasifier, and circularly sealing cover glass pipe and pre-leaving exhaust pipe; and using one section of glass pipe with interface connected with cover glass pipe connection interface such as bell mouth as heat transfer necking section, equipping with cold end of heat pipe and allocating in heat transfer necking section and circularly sealing cover glass pipe and pre-leaving exhaust pipe, or directly butting heat transfer necking section with interface connected with cover glass pipe and heat pipe to cover glass pipe circularly sealed on one end and having exhaust pipe. The cold end of heat pipe is connected and assembled with heat transfer necking section in low heat resistance state by heating to soften heat transfer necking section and/or pipe wall of cold end of glass heat pipe, precisely forming on die in blowing or vacuum shrinkage state, directly fitting and connecting assembly surface after grinding, equipping surface of cold end of glass heat pipe with channel for vacuum exhaust during precise forming; and filling heat transfer material or functional material in gap in case of larger gap between heat transfer necking section and cold end of glass heat pipe and larger gap error. The heat transfer material has elastic piece material with arch array connected everywhere. The functional material includes adhesive material such as silica gel to be cured or vulcanized, curing material such as cement slurry to be cured, thermosetting material such as thermosetting resin to be heated and cured, and ultrasonic welding material such as powder plastic to be ultrasonically fused to bond with two surfaces of gap. the silica gel is coated on elastic piece material with waveform cross section to increase contact area. The cover glass pipe, heat pipe and fin plate are roasted and vacuumed when heat pipe working medium is located in safe temperature condition. The exhaust pipe is cut and packed. An INDEPENDENT CLAIM is included for a vacuum heat collecting element of necking cover glass pipe inserted in heat pipe.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of vacuum heat collecting element of necking cover glass pipe inserted in heat pipe.