Within the framework of this work, the objective was to evaluate the performance of two hybrid varieties F1 (Thorgal and Mongal) foreign of tomato (Solanum lycopersicum L), with the use of saw dusts of wood decomposes, cultivated under shelter with Kisangani. It A was undertaken with an aim of improved the production of tomato with large fruit. The experimental culture used for the two varieties was a device of the blocks randomized at a rate of 3 repetitions per piece. The observation on the two hybrids F1 Thorgal and Mongal) carried on some quantitative characters in particular the average weight of fruits, the compartmental production and the output. For the hybrids F1 (Thorgal and Mongal) cultivated in the ground enriched by sawdust of wood: • The average fruit weight was higher with the variety T (92g) and less low with the variety T (78g); • The compartmental production was higher with the variety M (15 kg) and less low with the variety with the variety T (8,1 kg) and • The output was slightly higher than the variety T (3,7 tones/ha) and slightly lower than the variety M (3,1 tones/ha). For the hybrid variety F1 THORGAL and its witness • the average weight was slightly high with the pilot variety To (93g) and slightly less less high with the variety T (92g); • The compartmental production ranked above the witness To (9,4 kg) and lower than the variety T (8,1 kg) and • The output was identical to the variety T and its witness To (3, 7 tones/ha). For the hybrid F1 Mongal cultivated in the ground enriched by saw dusts by wood and its witness • The weight was higher with the variety M (78 G) and less low with its witness Mo (74 G); • The compartmental production was higher with the variety M (15 kg) and less low with its witness Mo (7,9 kg) and • The output was slightly higher than the variety M (3,1) and slightly lower than the variety Mo (3 tones/ha). The results obtained by these two hybrid varieties F1 (Thorgal and Mongal) show that the foreign varieties of tomato had two forms: form round observed with the variety T and form flattened with the Mr. variety As for the checking of our assumptions, the variety M is more powerful than the variety T enriched by saw dusts of wood. The influence of saw dusts of wood for the variety T did not have the impact.