PCB simulation element automatic test system and method

The present invention discloses a PCB simulation element automatic test system. A core control module performs D/A conversion of a received test command to obtain simulation voltage excitation signalswhich are applied to an in-circuit test module and are transmitted to a multi-path switching matrix through N test buses of the in-circuit test module; the multi-path switching matrix is connected with a needle bed, and the needle bed is connected with a tested PCB; under the control of the core control module, the multi-path switching matrix is moved according to the concrete position of a current tested component on the tested PCB, the contact pilotage of the needle bed is arranged to corresponding on-off states to allow the simulation voltage excitation signals to be applied to the testedcomponent on the corresponding PCB. The PCB simulation element automatic test system is small in size, low in cost, high in practicability and high in fault coverage rate, and can perform correct testof performances of common