The invention discloses a Loacl variable online monitoring method based on logical configuration generation. The method comprises the steps that first, a compiling mode of logical configuration software is utilized to generate a logical code; in the generated code, based on a security criterion carried in the logical configuration software, logic is switched into a unit independent in each step ofoperation; then, in a storage region of a lower computer, when a data storage region is allocated for input and output in each step, a backup region of the same size and type is allocated simultaneously; and next, a logic running result is monitored at each interface of the logic, and the logic is enforced at each input position. The method achieves the technical effect that a logical program generated by the logical configuration software is monitored and enforced.