In order to improve the flux and the quality of a neutron source, provided is a beam shaping body (60) for neutron capture therapy, wherein the beam shaping body (60) comprise beam inlet (61), target (62), moderator (63) adjoining to the target (62), reflector (64) surrounding the outside of the moderator (63), thermal neutron absorber (65) adjoining to the moderator (63), and radiation shield (66) and beam outlet (67) provided in the beam shaping body (60). A nuclear reaction occurs between target (62) and proton beams entering from the beam inlet (61), so as to produce neutrons. The neutrons form a neutron beam. The neutron beam defines main axe (X6). The moderator (63) slows down the neutrons produced by the target (62) when arriving at an epithermal neutron energy region. The moderator (63) is designed to be in a shape containing at least one cone. The moderator (63) has main body (631) and supplement section (632) surrounding the outside of the main body (631 and 731). The material of the supplement section (632) is different from that of the main body (631). The reflector (64) guide the neutrons deviating from the main axe back to the main axes (X6), so as to increase the strength of the epithermal neutron beam. The thermal neutron absorber (65) is used for absorbing thermal neutrons, so as to prevent the thermal neutrons from causing an excessive dosage for a superficial normal tissue during therapy. The radiation shield (66) is used for blocking leaking neutrons and photons, so as to reduce the normal tissue dosage of a non-irradiated region.一種用於中子捕獲治療的射束整形體，所述射束整形體包括射束入口；靶材，所述靶材與自所述射束入口入射的質子束發生核反應以產生中子，所述中子形成中子射束，所述中子射束限定一根主軸；鄰接於所述靶材的緩速體，所述緩速體將自所述靶材產生的中子減速至超熱中子能區，所述緩速體設置成包含至少一個錐體狀的形狀，所述緩速體具有主體部和包圍在主體部外周的補充部，所述補充部的材料與主體部的材料不同；包圍在所述緩速體外的反射體，所述反射體將偏離所述主軸的中子導回所述主軸以提高超熱中子射束強度；與所述緩速體鄰接的熱中子吸收體，所述熱中子吸收體用於吸收熱中子以避免治療時與淺層正常組織造成過多劑量；設置在所述射束整形體內的輻射屏蔽和射束出口，所述輻射屏蔽用於屏蔽滲漏的中子和光子以減少非照射區的正常組織劑量。
