Considering the advantage of plant roots of both water absorption and reinforcement，and relying on a dredging project，we carry out the field experiment on the use of Pennisetum hydridum for the ecological solidification of the shallow dredged soil. Observing the changes in water content，bearing capacity，soil nutrient content，and heavy metal content of the shallow dredged soil in the test area（depth of 0~90cm），we analyze and evaluate the effect of Pennisetum hydridum on the ecological solidification of the shallow dredged soil. It is found that 85 days after planting of the Pennisetum hydridum，the soil bearing capacity of the planted area increases from 11.8～27.7 kPa to 54.5～ 68.3 kPa，while the blank control area is only 33.4 kPa；The content of organic matter，alkaline hydrolysis nitrogen and available phosphorus increases by 25.5%~43.9%，6.5%~17.0%，1.5%~9.6% respectively； Pennisetum hydridum has an adsorption effect on heavy metals Cu，Zn，Pb，Cd，Ni. Among them，the adsorption effect of Cd is the most obvious. In conclusion，it is feasible to use Pennisetum hydridum to ecologically solidify the shallow dredged soil. It can accelerate the water loss of the shallow dredged soil and quickly solidify the shallow dredged soil，especially for the depth range of 30cm to 90 cm. In addition，the Pennisetum hydridum also has the improvement effect of increasing soil nutrient content and absorbing heavy metals.