Signal testing device for printed circuit board

The invention discloses a signal testing device for a printed circuit board. The signal testing device includes a plurality of input terminals for receiving external test signals, a plurality of output terminals for providing the external test signals for the printed circuit board, a plurality of switches which are arranged on paths between the plurality of input terminals and the plurality of output terminals and are used for controllably coupling the plurality of input terminals to the plurality of output terminals, an ammeter used for measuring a current value on a first selected path according to the action of the plurality of switches, and a voltage meter used for measuring a voltage value on a second selected path according to the action of the plurality of switches. With the signal testing device adopted, a measuring process can be simplified, and the automation degree of measurement can be improved.