PCR (polymerase chain reaction) instrument with partitions

The invention discloses a PCR (polymerase chain reaction) instrument with partitions. The PCR instrument comprises a PCR instrument body and is characterized in that a heating region comprises a cylindrical heating region with a bottom surface and a side surface; the cylindrical heating region is uniformly divided into a high-temperature modification region, a low-temperature annealing region and a stretching region from the circle center; a disk-shaped sample basin is arranged at the center of the cylindrical heating region; a rotary base is arranged at the bottom of the disk-shaped sample basin and is connected with a motor; the disk-shaped sample basin is uniformly divided into three units from the circle center, and an isolation region is arranged between every two units; a plurality of test tube holes are formed in each unit; each unit is provided with temperature sensors respectively, namely a first temperature sensor, a second temperature sensor and a third temperature sensor; the first temperature sensor, the second temperature sensor and the third temperature sensor are connected with a temperature loop controller; a display device, a control panel, the motor and the temperature loop controller are connected with a CPU (central processing unit). The time for rising and reducing the temperature is shortened, and the waste of resources is alleviated.