The present invention relates to the technical field of medical radiation devices. Disclosed are a multi-source focused radiation treatment head and a treatment device. The multi-source focused radiation treatment head comprises a source body and a collimating body, wherein a plurality of source-carrying chambers for accommodating a radiation source and a corresponding plurality of ray outlets are distributed on the source body; a plurality of collimating holes are distributed, in a manner corresponding to the plurality of ray outlets, on the collimating body; and a plurality of beams emitted by a plurality of radiation sources converge at a focus point by means of the plurality of collimating holes. The multi-source focused radiation treatment head further comprises at least one switch body, wherein the at least one switch body is located on one side, close to or away from the focus point, of the collimating body; and the at least one switch body can move so as to block/emit some of the plurality of beams. By means of controlling the movement of a switch body arranged on one side, close to or away from a focus point, of a collimating body so as to block/emit some of a plurality of beams emitted by a source body, the partial opening and closing of a source of a treatment head is realized, thereby achieving the objectives of precisely adjusting radiation strength and improving the accuracy of dosage control, thus obtaining a better treatment effect.