The invention relates to an automatic querying method for controlling a gold-plating current of a chip capacitor, which adopts a system consisting of (1) an electronic scale with a serial port communication function, (2) a computer with two recommended standard (RS)-232 serial ports, (3) a barcode printer and (4) barcode scanner, wherein the electronic scale weighs a product and sends data to thecomputer through the RS-232; the computer is used for running a program and a required database to conduct a data querying function and outputting a current barcode printing signal; the barcode printer is connected with the computer through the RS-232 and prints a current barcode; and the barcode scanner is connected with a programmable logic controller (PLC) and automatically reads current conditions to control the operation of gold-plating equipment. The querying method has the advantages of conveniently and quickly equalizing products, improving the efficiency of querying work, effectivelyavoiding faults caused by manual operation, controlling the accuracy of data query, preventing waste products generated by wrong input of the nickel and tin plating current and greatly reducing the labor intensity of an operator.