Fuel cell testing device with humidification function

The utility model provides a fuel cell testing device with a humidifying function, and belongs to the field of humidity testing. The utility model particularly relates to an assembly for humidification and humidity detection during battery testing. Comprising an outer pipe body and a detection device, a humidity sensor is arranged in the detection device, the detection device is arranged in the outer pipe body, the humidity sensor extends into the outer pipe body, the outer pipe body is of a pipe body structure with the closed bottom, an inner thread is arranged at the opening of the outer pipe body, and an extension pipe is arranged at the opening of the outer pipe body in a screwed mode and is sealed with the outer pipe body; connecting pipe nozzles are arranged on the side wall of the extension pipe and are distributed at 180 degrees, the detection device is arranged in the extension pipe and extends to the bottom of the outer pipe body, the detection device comprises a sealing plug, a guide-in pipe and an