The invention discloses a prostate biopsy robot, comprising a rotating driving device, a detector linear driving device, a detector rotating mechanism, a detector, a biopsy needle driving device, a biopsy needle and a control system. The rotating driving device comprises a chassis, a first servo motor, a main shaft and a disk, wherein the first servo motor drives the disk to rotate through the main shaft. A linear drive device of the detector is arranged on the disc and comprises a longitudinal guide rail lead screw mechanism and a transverse guide rod lead screw mechanism, wherein the transverse guide rod lead screw mechanism is arranged above the longitudinal guide rail lead screw mechanism. The detector rotating mechanism is arranged on the transverse guide rod lead screw mechanism. Andthe detector is mounted on the detector rotating mechanism. The driving device of the biopsy needle is fixedly connected with the disc, and comprises a vertical guide rail lead screw mechanism and aneedle feeding mechanism, wherein the needle feeding mechanism is connected with the vertical guide rail lead screw mechanism. The biopsy needle is arranged on the needle feeding mechanism. The invention has the advantages of compact structure, high automation degree, high matching degree of the detector and the biopsy needle, and can improve the biopsy precision, improve the operation quality andreduce the risk.