Method for expanding storage capacity of LKJ monitoring device

A method for expanding the storage capacity of a LKJ monitoring device comprises the steps as follows: (1) a co-processing unit is added to the LKJ monitoring device for providing a master control CPU with the co-processing function, and provides two 16-bit write-only registers (a data expansion enabled register inReg16_Expend_Able and a data expansion address register inReg16_Expand_Addr) for the master control CPU; (2) when the data expansion enabled register inReg16_Expend_Able is set disabled, the master control CPU can only access at least 2M BYTE space in a route data storage region; and when the data expansion enabled register inReg16_Expend_Able is set enabled, the co-processing unit works together with set values of the data expansion address register inReg16_Expand_Addr to gate more expanded spaces. The method has the advantages of simplicity and convenience for operation, simple structure after implementation, capability of significantly expanding the storage capability and the like.