The utility model provides a semiconductor detector. Semiconductor detector includes: the detector crystal is including crystal main part, positive pole and negative pole, the field intensifier electrode for apply voltage to the detector crystal, insulating material, set up in intensifier electrode with between the detector crystal surface. Semiconductor detector is still including an intensifier electrode circuit board, intensifier electrode circuit board have with detector crystal surface contact's bottom articulamentum and with the relative top layer of bottom articulamentum, wherein semiconductor detector's high pressure input is connected to the top layer, the bottom articulamentum with there is insulating material between the detector surface of detector crystal. The utility model discloses a splicing thread electrode energy resolving rate of detector can be further improved, the influence of dark current is reduced.