Abstract: A wide range pulsed neutron detection technology based on BF3 proportional counters is introduced. In this technology, multi-channel and modular BF3 tube array neutron detectors are adopted to achieve a wide range of pulsed neutron test applications, and the lower limit of measurement is also taken into account. Based on this technology, a set of BF3 array neutron detection system was developed and applied to the testing of pulsed neutron source. The experimental results show that the pulsed neutron measurement range of the system can reach the range of 56 to 8106, the lower limit of measurement is low and the output signal is clear, indicating the feasibility and effectiveness of the technology.