Negative lens focal length test device

The utility model relates to a negative lens focal length test device comprising a light source, a target simulation system, a monitoring system and a data acquisition and processing system. The target simulation system and the monitoring system are arranged on a light emergent path of the light source in turn. The monitoring system and the data acquisition and processing system are connected. A negative lens to be measured is arranged between the target simulation system and the monitoring system. The utility model provides the negative lens focal length test device which is low in error and high in measuring efficiency.