Abstract: The aim was to discuss the effect of soil bulk density, soil moisture content, and soil salinity content of dirp irrigation cotton continuous cropping in different tillage depth before plant. For the typical of drip irrigation cotton continuous cropping, three different plough depth processes of 20, 40 and 60 cm were set up before plant. In the growth period, the above indicators were measured in different soil profile of different treatments, and its change was studied. (1) The soil bulk density along with the plough depth increase was down, among the surface soil bulk density more than deeper soil bulk density. (2) The moisture content of soil profile under three different plough depth process were 0-20 cm＞20-40 cm＞40-60 cm. Along with the plough depth increase, the soil moisture content of 0-20 cm was rose trend, the range of soil moisture content of 20-40 cm was not big, the soil moisture content of 40-60 cm was significantly decreased. (3) After the water, the soil salinity content of plough depth 20 cm was 0-20 cm＞20-40 cm＞40-60 cm, but with the plough depth increase, the soil salinity content of 0-20 cm was down trend, the soil salinity content of 20-40 cm and 40- 60 cm were rapidly rose trend, to plough depth 60 cm, the soil salinity content were 40- 60 cm＞20-40 cm＞0- 20 cm. 60 cm of supernormal ploughed for drip irrigation cotton continuous cropping could effectively reduce soil bulk density of plough layer, improve soil moisture content of 0- 20 cm, reduce soil salinity content, thus conducive to crop growth.