The invention relates to a dynamic stepless racemization system and method based on high-level integration of a large-scale integrated circuit. The system comprises a video acquisition module, a video decoding module, a video storage module, a data communication module, a video coding module, a dynamic stepless racemization module and a pixel merging module, namely a four-in-one module, which is innovatively designed for reducing algorithm delay and improving the utilization rate of bus bandwidth. According to the invention, the dynamic stepless racemization function is realized by adopting the high-level comprehensive technology, real-time racemization processing can be carried out on the acquired video image in a photoelectric platform, and compared with an existing racemization technology, the characteristics of FPGA parallel acceleration and assembly line optimization are fully utilized, the system and method have the excellent characteristics of high video resolution, large racemization range, high racemization precision, clear and sawtooth-free processed images, low output delay, high system stability, easiness in processing, low power consumption, small size and the like.