The invention discloses a static real-time CT imaging system adaptable to large visual field requirements and an imaging method. The static real-time CT imaging system includes a multifocal annular X-ray source (21) and a ring photon detector (22), wherein, the multifocal annular X-ray source (21) is composed of a plurality of scanning X-ray sources arranged in a ring shape, and the annular photon counting detector (22) is composed of a plurality of photon counting detector modules arranged in a ring shape. Each scanning X-ray source emits a wide beam of X-rays in turn which passes through the object to be measured and arrives at the corresponding photon counting detector module, and non-inverse geometry imaging is used between the scanning X-ray source and the corresponding photon counting detector module. The photon counting detector modules operate in an overlapping manner and send corresponding exposure information to the data acquisition processing unit, and the image is reconstructed in real time and visualized in the data acquisition processing unit.