To study the effects of corn straw mulch and no-till measurement on the soil properties to the physical proper-ties,such as its compaction and moisture .Series of experiments on test field were conducted at Lishu county , Jilin prov-ince .The changing characteristics of compaction and moisture in different topsoil depth under the different conditions of no-till in different corn straw mulch coverage and no-till in years varied were discussed .The results showed that soil compaction of corn straw mulch and no-till at depth of 0~20 cm is higher than that of conventional tillage ( CK ) , but lower at depth of 20~50cm,and with the increase of no-till time, the tillage pan fade away.Soil moisture of corn on-till at depth of 0~50 cm enhanced by 14.78%~23.64%compared with CK.And it shows the same change trend with cov-erage and persists years of corn straw mulch and no-till.But with the soil depth increased ,it enhances first and drop af-ter .Hence , at rain-fed farming areas , it is quite significant and vital to take advantage of straw mulch and no-till tech-nology to promote crop growth and ensure its high and stable yield .%为研究秸秆覆盖免耕措施对土壤紧实度、水分等物理性质的影响，以吉林省梨树县高家村试验田为研究对象，探讨免耕秸秆不同覆盖量和免耕秸秆不同覆盖年限条件下，不同耕层深度土壤紧实度及水分变化特征。结果表明：秸秆覆盖免耕地0～20cm耕层土壤紧实度高于传统耕作（CK），20～50cm 耕层土壤紧实度低于 CK，因免耕年限的增加，犁底层逐渐消失。秸秆覆盖免耕地0～50 cm 土壤含水量较 CK 提高了14．78％～23．64％，且随秸秆覆盖量、秸秆还田年限的增加而增大；随耕层深度的增加，水分含量先增加后减少。因此，在雨养农业区，因地制宜地采取秸秆覆盖免耕措施对促进作物生长、保证粮食高产稳产具有重要意义。
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