The invention relates to a local relay protection control device and a relay protection method. The relay protection method comprises the steps of respectively transmitting related data information of a power system to a master control module and a starting control module; performing starting logic distinguishing by the starting control module according to the received related data information, and performing protection logic distinguishing and starting logic distinguishing by the master control module according to the received related data information; and outputting a protection action signal when the starting logic distinguishing performed by the starting control module and the master control module acts and the protection logic distinguishing acts. Compared with a relay protection mode for directly performing protection logic judgment, the relay protection module has the advantages that the probability of local protection misoperation is reduced, so that the requirement of high relay protection reliability of local protection in an extremely severe running environment can be met.