While meat becomes a luxury food for the poor people, legumes including soya bean, can constitute an alternative. Unfortunately, on highly weathered soils of Lubumbashi, the performance of this crop remains far below the potential. The effects of compost of Tithonia diversifolia on growth and yield of soybean were studied during the 2013-2014 cropping season on degraded soil Lubumbashi (DR Congo). Under a basic fertilizer, six levels of compost of T. diversifolia (0, 7.5T, 15T; 22,5T; 30T; 37,5T ha) were applied as treatments in a completely randomized block design with 3 replications. The observations were focused on vegetative parameters and the yield of the crop. Similar behavior of soya bean plants was observed, regardless of the dose of compost made. Under the supply of mineral fertilizers, the supply of composts to soybeans mustn't be recommended given the low-income of farmers and the availability of composts.