Full-automatic tester for load box

The invention discloses a full-automatic tester for a load box, which comprises a personal computer (PC) and is characterized by also comprising a digital signal processor (DSP) control module, an analog digital (AD) sampling module, a digital/analog (D/A) conversion module and a numerical control linear power supply. The PC is communicated with the DSP control module through a controller area network (CAN) bus, the DSP control module is connected with the D/A conversion module, the D/A conversion module is connected with the numerical control linear power supply, the numerical control linear power supply and a load box to be tested are connected with a stably-transmitting voltage signal, the load box to be tested is connected with the AD sampling module, and the AD sampling module is connected with the DSP control module. By the full-automatic tester, the problems of lower measuring precision, insufficient display digits and slow testing speed of a calibration device of the load box in the prior art are solv