Using seeds of Ulmus pumila Linn.as material,the effect of weed control and seedling growth on sowing of Ulmus pumila Linn.under black plastic covering were studied.The results showed that the growth on sowing of Ulmus pumila Linn. had been obviously promoted and the growth of annual weeds had been obvious inhibited under black plastic covering by statistical analysis of plant height and ground diameter of Ulmus pumila Linn.,and the number of annual weeds on the field.