In this study bioassay-guided screening of Tecomella undulate was performed for its cytotoxic, antimutagenic and anticancer potential. The ariel parts were extracted on a polarity basis (methanol, dichloromethane and hexane). The in vivo toxicity was assessed on Caenorhabditis elegans, and its locomotion was affected by Tecomella undulata hexane (TUAH) the most. Ames test for antimutagenicity showed Tecomella undulata methanol (TUAM) exhibited against mutagen 2AA showed inhibition of 71.03% and 26.32% 2AA in TA98 while in in vitro MTT assay on carcinoma cell lines TUAM showed 68.1% cytotoxicity. Moreover, In resazurin assay on fibroblast cells African green monkey kidney VERO and on the panel of carcinoma cell lines, the most effective extract was TUAM on liver HepG-2 with CC value 117.37 ± 4.73 µg/ml followed by on lungs A549 with 142.01 ± 5.3. Furthermore, for the bioassay-guided screening, the selectivity index was calculated for TUAM CC ratio on HepG-2 and VERO which showed a decent 2.77 score. After column chromatography, the fraction TU-63 should remarkable cytotoxic effect in dose-response manner assay as (Hep-G2) CC value 11. 67 ± 1.37 µg/ml followed by (A549) CC value 17.23 ± 0.58 µg/ml. For qualitative analysis of anticancer potential LC-ESI-MS/MS the potential phytochemicals were identified. In silico molecular modelling against selected carcinogenic proteins. The results suggest Tecomella undulate the substantial anticancer potential which supports potential natural anticancer therapeutic drug candidate development for combating cancer.