Objective: The main objectives of the study are preliminary phytochemical screening, antioxidant activity and in vitro thrombolytic activity evaluation of extract Phlogacanthus thyrsiflorus. Methods: Preliminary phytochemical analysis was done by using standard methods. Human blood clot lysis was used to evaluate the thrombolytic activities. The antioxidant activity is evaluated by free radical scavenging activity of DPPH (1,1-diphenyl-2-picrylhydrazyl) method and total phenolic content. Results: Preliminary phytochemical screening revealed the presence of various bioactive components like Tannin, Saponins, Phenol and Flavonoids. In thrombolytic assay, a significant clot lysis was observed plant extract compared to the negative control. The plant could be beneficial in synthetic drug formulation by virtue of the presence of antioxidant activity. The crude extract of plant were found to have Antioxidant activity with the concentration of 20 µg/ml, 40 µg/ml, 60 µg/ml, 80 µg/ml, 100 µg/ml respectively compared to control and standard. In DPPH scavenging assay, IC50 values of extract and ascorbic acid were found to be 31.87 µg/ml and 52.04 µg/ml respectively. Total phenol content was 10.5 mg. Conclusion: In conclusion, with this study it could be concluded that the phytochemical, antioxidant assay and thrombolytic activity of methanol extract Phlogacanthus thyrsiflorus would give valuable information for further characterization and exploitation of this important medicinal plant.