Sardar Bhagat’s Singh’s contribution to the national movement is described in the following points: 

1. Role in non – co – operation movement:

In 1920, Gandhiji started the non – co – operation movement. At that time, Bhagat Singh,who was a student of class IX actively participated in the movement. When Gandhiji suddenly postponed the movement in 1922, Bhagat Singh was greatly shocked. He then took admission in National College, affiliated to Kashi University. Lala Lajpat Rai delivered many lectures on patriotism in the college. He was greatly influenced by the revolutionary thoughts and historical evidences given by Jai Chand Vidhyalankar.

2. Contribution to the national movement as a journalist: 

Sardar Bhagat Singh learnt journalism from the Editor of ‘Pratap’ Shri Ganesh Shankar Vidyarthi at Kanpur. After this, Bhagat Singh started writing for PRATAP published from Kanpur by the pen name ‘Balwant’. He also wrote for KIRTI published from Punjab by the pen name ‘Vidrohi’. Besides these, his articles appeared in special ‘phansi’ edition of the CHAND magazine published from Allahabad. Bhagat Singh wrote some books during his imprisonment, viz –

• Biography
• Door to Death
• The Revolutionary Movement in India.
• All these had general impact on the national movements.

3. Establishment of Indian Socialist Republican Army: 

After the Kakori incident, Bhagat Singh came in contact with Chandra Shekhar Azad. He established the Hindustan Socialist Republican Army to uproot the British rule from the Indian soil. He started collecting money to buy arms for the revolution. Bhagat Singh was secretly named Balwant Singh in this secret revolutionary wing.

4. Saunder’s Murder:

Lala Lajpat Rai led the procession which boycotted the Simon Commission on 20th October 1928. During the lathi charge by the police superintendent Saunders, Lala Lajpat Rai was badly injured. Consequently, Lala Lajpat Rai died due to his injuries on 17th November 1928. This fatal attack on Lala Lajpat Rai was like crushing the national movement. To avenge this disgraceful act, Bhagat Singh, along with his fellow revolutionaries, attacked the police station at Lahore. While coming out of the police station, in place of police superintendent Scott,he killed Asst. Police Superintendent Saunders by the bullets of his pistol. Bhagat Singh wanted to kill Scott, but Saunders was killed by mistake.

5. Bomb explosion in the Central Assembly Hall: 

Challenging the British administration, Bhagat Singh and Batukeshwar Dutt, on April 1929, threw a bomb on the empty benches in the Central Assembly Hall at a time when the President Vitthal Bhai Patel was speaking on the Public Safey Bill. Terror was let loose in the Assembly Hall.

Both the heroes of the revolutionary path did not escape, their they raised the slogan in the Assembly Hall, ‘Inquilab Zindabad’, and, May the Imperialism perish forever’. They distributed some red pamphlets on behalf of the Hindustan Socialist Republican Party, which read, ‘To reach our voice to the deaf ears”. Their purpose of throwing bomb in the Assembly Hall was not to murder anyone, but to shake the cruel British rulers from the slumber of ignorance.

6. Awarded death / capital punishment: 

The police, besides Bhagat Singh and Batukeshwar Dutt, involved other revolutionaries in the Bomb explosion incident of Centrial Assembly Hall of Delhi. Justice Hilton announced the death sentence conferred to Bhagat Singh, Sukhdev and Rajguru in connection with the bomb explosion case. In spite of demonstration and opposition everywhere, Bhagat Singh and his fellow revolutionaries were hanged to death on 23rd march 1931 in Lahore jail A wave of deep sorrow spread throughout the country.

On the basis of above mentioned description, it can be said that Sardar Bhagat Singh showed exemplary courage as a revolutionary and played a historic role as a socialist thinker and patriot. His heroic deeds sowed the seeds of public consciousness against the British rule in India.