The embodiment of the invention provides a control method for reducing the program upgrading amount of metering equipment, which comprises the following steps of: dividing a program area of the metering equipment into metering related sub-areas and non-metering related sub-areas, and filling a function pointer table initialization function in each divided sub-area; Establishing a function pointertable for each sub-region; And executing each executable file one by one, initializing the content in the function pointer table according to the function pointer table initialization function in eachsub-region, and updating the content of function calling by means of the storage position of the function address in the initialized function pointer table. In the upgrading process, only the function pointer table needs to be ensured to be normal; Therefore, except for the function of initializing the function pointer table in each subarea, all functions called by other areas do not need to be subjected to address fixing operation, and the problem of space waste caused by fixed function addresses and reservation of a certain storage space for the functions is avoided.