Introduction: Spinal anaesthesia is a form of regional anaesthesia which involves injection of local anaesthetic into subarachnoid space. Many severely preeclamptic parturients require cesarean delivery where spinal anaesthesia can be given. Methods: Aim of study was to compare and evaluate onset and duration of sensory and motor block and heamodynamic effect of inj .bupivacaine 0.5%( heavy) in severe preeclampsia parturients posted for cesarean delivery than healthy parturients. Material and method: After approval from ethical committee ,100 patients were selected in age group of 20-30 with weight between 60 -90 kg undergoing cesarean delivery. Results: Parturients with severe preeclampsia experienced less hypotention and more stable heamodynamics, during spinal anaesthesia who were posted for elective cesarean delivery than normotensive parturients. Conclusion: Parturients with severe preeclampsia who are posted for elective cesarean delivery can be given spinal anaesthesia which will cause less hypotension and more stable heamodynamics.