以鉴４（Ｊ４，耐盐性较强）和科品７号（Ｋｐ７，耐盐性较弱）大麦叶片为材料，研究了在不同浓度盐处理下Ｈ２Ｏ２累积和Ｈ２Ｏ２清除酶的活性变化。结果表明，在３００ｍｍｏｌ／ＬＮａＣｌ处理７天期间，科品的Ｈ２Ｏ２累积量大于鉴４；两品种超氧化物歧化酶（ＳＯＤ）维持较高活性，鉴４的过氧化氢酶（ＣＡＴ）活性呈上升趋势，科品的却下降；鉴４清除Ｈ２Ｏ２能力大于科品，其中ＣＡＴ起关键作用。用５ｍｍｏｌ／ＬＨ２Ｏ２或０．５ｍｍｏｌ／Ｌ甘露醇处理盐胁迫中的大麦，能缓解盐对科品７号的胁迫作用。 The changes of H2O2 accumulation and H2O2 scavenging enzyme activities under different concentrations of salt were studied under the conditions of 4 (J4, salt-tolerant) and Kp7 (salt tolerance-less) barley leaves. The results showed that the accumulation of H2O2 was higher than that of Jian 4 in the treatment of 300 mmol / L NaCl for 7 days. The activities of superoxide dismutase (SOD) in the two cultivars maintained high activity and CAT activity in Jian 4 increased Trend, but the decline in science and technology; Kam 4 H2O2 removal ability than science, of which CAT plays a key role. Treatment of barley with salt stress with 5mmol / L H2O2 or 0.5mmol / L mannitol can alleviate the salt stress on K7.