The present invention relates to a measurement and control device and a misoperation-preventive locking logic display method thereof, which belong to the technical field of power system protection and automation. The method of the invention firstly determines the misoperation-preventive locking logic according to a misoperation-preventive logic rule base; then, the determined misoperation-preventive locking logic is loaded into the measurement and control device; the measurement and control device identifies the received misoperation-preventive locking logic and marks it with an OR gate logic, and the corresponding logical expression is split into at least two parallel sub-logical expressions; and finally the contents of the sub-logical expressions obtained are graphically displayed. The method of the invention can display the blocking logic diagram in real-time on the measurement and control device so as to make the engineer intuitively, conveniently and real-time determine whether the blocking logic result reflects the actual working condition of the equipment layer and to facilitate the debugging progress of the automation project of a substation.