This school was established in 1895. In the first instance, this school was established in a thatched building. In view of the increase in the number of students, if additional space is required, teaching is immediately started in Babu Pratap Chandra Das's shed. In order to ensure proper teaching and seating arrangements for the growing number of students, Babu Ramaprasad Mallick, the then zamindar of Agradwip State, continued to bear all the expenses of running this school and named it HM Institution to commemorate the name of his father Harimohan Mallick Mahashay.

The names of Nimgachi Jessamuddin Sarkar, Babu Raghunath Majumder and others are notable among those whose names are found as donors in the school documents. Babu Saratchandra Chatterjee also sold his 1.17 acres of land near Mahashay and Vidyalaya. According to the deed executed on July 28, 1928, Babu Ramranjan Mallick, son of Madhusudan Mallick, son of Harimohan Mallick, donated 17,000 rupees for the value of the school building and other furniture built on it along with 2.24 acres of land.[1]

According to the Calcutta University Ordinance, in 1928, the management of this school was entrusted to the managing committee of the school. In 1911, students of this institution participated in the matriculation examination for the first time. In 1913, all the students who appeared for the matriculation examination passed the first division. On 15 November 1968, the school was nationalized as Harimohan Government High School.