The utility model belongs to an or-separation protective type limit-exceeding control circuit, which utilizes eight analog integrated (circuit) voltage comparators B1 to B8 as core devices, uses new principles of or-separation protective control, and forms four independent units through an ingenious connection mode. Each independent unit circuit has the unique important functions that the protective control circuit has priority control rights to load. When an input sensing circuit generates abnormal faults (such as Ntc circuit breaking), and protective control and fault display (protective display) are carried out in time for preventing a transfinite control circuit from off-control. The or-separation protective type limit-exceeding control circuit is applied in control circuits such as temperature, pressure, water level and the like, can improve the safety performance, and avoids serious accidents (such as fire hazards). Furthermore, since the or-separation protective type limit-exceeding control circuit has very low cost (eight pin packaging can contain two independent unit circuits and the external circuits are simple), the or-separation protective type limit-exceeding control circuit has wider uses in electronic application fields such as small household electrical appliances, simple control circuits and the like, and enables the product performance price rate to be higher.