The invention discloses PCB automatic electric testing equipment. The PCB automatic electric testing equipment comprises a worktable, conveying rails and a controller; a PCB conveying direction is defined as a front side; two front-back conveying rails are arranged on the worktable; the conveying rails are provided with conveying driving mechanisms; two carrying plates are arranged above the worktable; the two carrying plates are arranged in the front-back direction of the worktable, and are respectively positioned on the outer sides of the two conveying rails; hoisting driving mechanisms fordriving the carrying plates to move up and down are arranged below the carrying plates; front and back positioning blocks matched with the front and back sides of PCBs are arranged on the upper surfaces of the carrying plates; the two positioning blocks realize approaching or leaving through front and back clamping driving mechanisms to clamp or loosen the PCBs; and sets of measuring needle devices are symmetrically arranged on the outer sides of the two carrying plates. The PCB automatic electric testing equipment detects the PCBs with different sizes, improves the detecting safety, guarantees the quality of the PCBs, automatically controls the whole production process, and improves the detecting efficiency.