A focussed radiotherapy apparatus (100) and a radiation therapy device (200), the focussed radiotherapy apparatus (100) at least comprising: a source body (10), provided with a plurality of radiation sources (11) a pre-collimation body (20), fixedly connected to the source body (10), the pre-collimation body (20) comprising a plurality of pre-collimation holes, the pre-collimation holes corresponding to the radiation sources (11) in a one-to-one manner a collimation body (30), covering the source body (10) and the pre-collimation body (20) and rotating with respect to the source body (10) and the pre-collimation body (20), the collimation body (30) comprising at least one curved surface, a plurality of groups of collimators, having different specifications, and shielding positions (31) being arranged on the curved surface, each group of collimators and/or shielding positions (31) being arranged in correspondence with the radiation sources (11), the collimation body (30) rotating to switch different groups of collimators and/or shielding positions (31) to be aligned with the radiation sources (11) so as to obtain different field sizes and/or implement at least partial shielding of the source body (10) a switch body (40), arranged on an outer side of the collimation body (30) and moving with respect to the source body (10), the pre-collimation body (20) and the collimation body (30) so as to enable rays of the radiation sources (11) to be focussed or shielded.Linvention concerne un appareil de radiothérapie (100) et un dispositif de radiothérapie focalisée (200), lappareil de radiothérapie (100) comprenant au moins : un corps de source (10), pourvu dune pluralité de sources de rayonnement (11) un corps de pré-collimation (20), relié de manière fixe au corps de source (10), le corps de pré-collimation (20) comprenant une pluralité de trous de pré-collimation, les trous de pré-collimation correspondant un par un aux sources de rayonnement (11) un corps de collimation
