Aiming at the defects of passive compensation optical fiber loop radio frequency transfer scheme using discrete devices to realize double-sideband with carrier suppression(DSBCS) modulation, the stability optimization design and test verification of optical fiber loop radio frequency transmission system based on DSBCS modulation are carried out. An integrated access node circuit based on radio chip is designed to shield crosstalk and reduce the influence of external temperature with cavity separated metal and high-precision temperature control module. The system circuit bottom noise and 60 km optical fiber loop system performance are tested. The test results show that the integrated access node circuit significantly reduces the system circuit bottom noise and 1 m optical fiber transmission bottom noise. The relative stability of the output frequency at 20 km/40 km and 40 km/20 km of 60 km optical fiber loop is better than 4×10-14/s and 2×10-17/day. The long-term stability is about one order of magnitude better than that when the node circuit is realized by separate devices.