All aspects of plant growth and development are adversely affected by salinity stress. In arid and semi-arid regions, where rainfall is scanty, this detrimental effect on the crop productivity becomes more prominent. Salt stress induced crop losses are likely to increase substantially in the coming decades if appropriate corrective measures are not undertaken to tackle the intertwined menaces of salinity, water logging, and ions toxicities. This study clarifies the effectiveness of Cut-soiler (machine) constructed rice residue filled preferential shallow sub surface drainage (PSSD) to improve the drainage function and consequent effect on growth traits and yield of mustard during 2019-21. The study comprised of Cut-soiler drains as main plot treatment with two soil types (sub-plot) and three irrigation water salinity (4, 8, 12 dS m-1) as sub-sub plot treatment in a double replicated split-split experiment. Cut-soiler PSSD resulted in higher drainage outflow of water and salts with applied irrigation and rainfall events and reduced soil salinity by ~50.36 % without any extra salt loading even with the application of 12 dS m-1 salinity water irrigation. Such reduction in soil ECe, due to Cut-soiler constructed PSSD, led to significant improvement in plant height, number of leaves, branches and plants, leaf weight ratio, leaf area duration, specific leaf area, specific leaf weight, absolute growth rate and dry matter efficiency. These positive changes consequently enhanced mustard biological yield (18.08 %) and dry matter efficiency. All together it was observed that Cut-soiler PSSD effectively reduced the soil salinity even under the application of saline water (upto 12 dS m-1) irrigation.