对新型组合PIN脉冲中子探测器的灵敏度进行了研究 ,实验测量探测器的DT中子灵敏度和γ相对灵敏度 ,用Monte Carlo方法计算了探测器的中子灵敏度 .实验测量和计算表明 :通过转换靶的选取 ,组合PIN探测器的中子灵敏度在一定范围内连续可调 ,组合PIN探测器对γ的灵敏度比普通PIN探测器低 2个量级 ,是一种对γ不灵敏的新型脉冲中子探测器 . The sensitivity of the new combined PIN pulse neutron detector was studied, the DT neutron sensitivity and γ relative sensitivity of the detector were measured experimentally, and the neutron sensitivity of the detector was calculated by Monte Carlo method.Experimental measurement and calculation showed that: The selection of the target, combined PIN detector neutron sensitivity continuously adjustable within a certain range, combined PIN detector γ sensitivity than the average PIN detector two orders of magnitude, is a γ-insensitive new pulse Sub-detector.