The subjects oral administration sc10914 tablets 400mg on an empty stomach, three times a day, for 28 consecutive days as a treatment cycle, until disease progression (PD) (according to Recist1.1 and the adjusted PCWG3 standard, the subjects met the imaging [CT / MRI / bone scan] PD standard) or the toxicity was intolerable.~The study is divided into two stages: in the first stage,enrolled 36 patients whose response can be evaluated, if there are at least 7 cases of objective remission (CR or PR), the second stage is allowed, otherwise the study will be stopped; in the second stage, the number of subjects whose response can be evaluated is planned to continue to be enrolled to 70 cases（stage 1 and stage 2）.
This study is a multicenter, single arm phase I / II clinical study in mCRPC subjects who failed to receive docetaxel chemotherapy, abitolone acetate and / or enzalutamide (including its analogues) for the treatment of BRCA mutations in germ cells and / or somatic cells.