The method of planting grassland with strip trenches and grass blocks was studied in eroded hillside fields.After planting grassland with strip trenches and grass blocks,the amount of soil and water loss in the runoff plot within 3 months was only 140 kg.It decreased 823,249 and 670 kg,respectively,in comparison with the plots of no-planting with soil surface prepared,original slope surface and contour planting with full reclamation.Soil and water loss rate in the runoff plot with strip trenches and grass blocks was 1 500 t/km² in the first year.It reduced 10 591,3 514,and 7 760 t/km²,respectively,in comparison with the plots of the no-planting with soil surface prepared,the original slope surface and the contour planting with full reclamation.Soil and water loss rate in the runoff plot with strip trenches and grass blocks was less than 700 t/km² in the next year.The types of grass vegetation increased from 6 to 16 after three year construction.Coverage rate increased by 85% in the first year of controlling eroded hillside fields.These show that soil and water loss can be controlled in a short time.