A neutron capture therapy system comprising: a neutron generating device (10, 10") comprising an accelerator (11, 11') and a target, wherein a charged particle beam generated by acceleration of the accelerator acts with the target to generate a neutron beam; a beam shaping assembly (20, 20") comprising: a moderator configured to moderate the neutrons generated from the target to an epithermal neutron energy range, a reflector surrounding the moderator, wherein the reflector directs deviating neutrons back to the moderator to enhance intensity of an epithermal neutron beam, a thermal neutron absorber provided to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, a radiation shield provided to shield leaking neutrons and photons so as to reduce dose to normal tissues in a non-irradiation area, and a beam exit, wherein the radiation shield around the beam exit is disposed at the rear of the reflector; characterized in that the neutron capture therapy system further comprises a concrete wall accommodating the neutron generating device and the beam shaping assembly; and a reinforcing portion at least partially disposed in the concrete wall; wherein the concrete wall and the reinforcing portion are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti, and wherein the reinforcing portion comprises a circular ring disposed around the beam shaping assembly, a frame disposed around the circular ring, and distribution ribs (c) distributed in the concrete at a preset spacing in the horizontal direction, the vertical direction, and the thickness direction of the concrete. a neutron generating device (10, 10") comprising an accelerator (11, 11') and a target, wherein a charged particle beam generated by acceleration of the accelerator acts with the target to generate a neutron beam; a beam shaping assembly (20, 20") comprising: a moderator configured to moderate the neutrons generated from the target to an epithermal neutron energy range, a reflector surrounding the moderator, wherein the reflector directs deviating neutrons back to the moderator to enhance intensity of an epithermal neutron beam, a thermal neutron absorber provided to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, a radiation shield provided to shield leaking neutrons and photons so as to reduce dose to normal tissues in a non-irradiation area, and a beam exit, wherein the radiation shield around the beam exit is disposed at the rear of the reflector; characterized in that the neutron capture therapy system further comprises a concrete wall accommodating the neutron generating device and the beam shaping assembly; and a reinforcing portion at least partially disposed in the concrete wall; wherein the concrete wall and the reinforcing portion are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti, and wherein the reinforcing portion comprises a circular ring disposed around the beam shaping assembly, a frame disposed around the circular ring, and distribution ribs (c) distributed in the concrete at a preset spacing in the horizontal direction, the vertical direction, and the thickness direction of the concrete. a moderator configured to moderate the neutrons generated from the target to an epithermal neutron energy range, a reflector surrounding the moderator, wherein the reflector directs deviating neutrons back to the moderator to enhance intensity of an epithermal neutron beam, a thermal neutron absorber provided to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, a radiation shield provided to shield leaking neutrons and photons so as to reduce dose to normal tissues in a non-irradiation area, and a beam exit, wherein the radiation shield around the beam exit is disposed at the rear of the reflector; characterized in that the neutron capture therapy system further comprises a concrete wall accommodating the neutron generating device and the beam shaping assembly; and a reinforcing portion at least partially disposed in the concrete wall; wherein the concrete wall and the reinforcing portion are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti, and wherein the reinforcing portion comprises a circular ring disposed around the beam shaping assembly, a frame disposed around the circular ring, and distribution ribs (c) distributed in the concrete at a preset spacing in the horizontal direction, the vertical direction, and the thickness direction of the concrete.