Abstract: Brush cutting and weeding were taken respectively in different bamboo groves which were harmed by leaf mites.After one-year study,the results showed that the damages and population density of leaf mites in weeded bamboo grove was higher than that in brush-cut bamboo grove.It was suggested that tending should hinge on local conditions.Bamboo grove should not be weeded,where brush was not luxuriant and the soil was porous.Brush cutting should be taken on August to September in bamboo grove where brush was luxuriant,but no weed.Study of letting off predatory mites to control harmful leaf mites showed that the control effect in bamboo grove with weeds was better than that in bamboo grove where weeds was eliminated or brush was cut.So complete reclaim and brush cutting should be prohibited in bamboo grove when predatory mites were used to control harmful leaf mites.