In view of the problem commonly found in the multi-point measurement process where the system needs to be readjusted due to the increase or decrease of transmitter number in the process of single parameter measurement, a self-adaptive transmitter current average measurement circuit has thus been designed. The circuit can automatically filter the input currents within the effective range, control the various digital potentiometers to disconnect the inactive input currents, adjust the shunt ratio of the active ones, and obtain the average value by adding these currents together. The experimental results show that this design is characterized with such advantages as convenience, flexibility, quick response and great practicability.