从桥接故障的两个特点出发，提出了一种快速盲测法，该法弥补了伪穷举法的不足。它既适用于组合逻辑电路、又适用于时序逻辑电路的短路故障测试。在６Ｋ型电力机车微机控制箱的测试与故障诊断过程中的成功应用，证实了该方法的有效性。 Based on the two characteristics of bridge fault, a fast blind method is proposed, which makes up for the deficiency of pseudo-exhaustive method. It applies to both combinational logic circuit, but also for short-circuit fault logic sequencing logic test. The successful application of 6K electric locomotive microcomputer control box in testing and fault diagnosis process proves the effectiveness of this method.