how nepal became democratic country?
In the late 1940s, newly emerging pro-democracy movements and political parties in Nepal were critical of the Rana autocracy. Meanwhile, with the invasion of Tibet by China in the 1950s, India sought to counterbalance the perceived military threat from its northern neighbour by taking pre-emptive steps to assert more influence in Nepal. India sponsored both King Tribhuvan (ruled 1911–55) as Nepal's new ruler in 1951 and a new government, mostly comprising the Nepali Congress Party , thus terminating Rana hegemony in the kingdom.
After years of power wrangling between the king and the government, King Mahendra (ruled 1955–72) scrapped the democratic experiment in 1959, and a "partyless" panchayat system was made to govern Nepal until 1989, when the "Jan Andolan" (People's Movement) forced King Birendra (ruled 1972–2001) to accept constitutional reforms and to establish a multiparty parliament that took seat in May 1991.  In 1991–92, Bhutan expelled roughly 100,000 Bhutanese citizens of Nepali descent, most of whom have been living in seven refugee camps in eastern Nepal ever since.In 1996, the Communist Party of Nepal (Maoist) started a bid to replace the royal parliamentary system with a people's socialist republic by violent means. This led to the long Nepal Civil War and more than 12,000 deaths. On 1 June 2001, there was a massacre in the royal palace. King Birendra, Queen Aiswarya, and seven other members of the royal family were killed. The perpetrator was Crown Prince Dipendra, who committed suicide (he died three days later) shortly thereafter. This outburst was alleged to have been Dipendra's response to his parents' refusal to accept his choice of wife. Nevertheless there are speculation and doubts among Nepalese citizens about who was responsible.
Following the carnage, Birendra's brother Gyanendra inherited the throne. On 1 February 2005, Gyanendra dismissed the entire government and assumed full executive powers to quash the violent Maoist movement,  but this initiative was unsuccessful because a stalemate had developed where the Maoists were firmly entrenched in large expanses of countryside yet could not dislodge the military from numerous towns and the largest cities. In September 2005, the Maoists declared a three-month unilateral ceasefire to negotiate.
In response to the 2006 democracy movement King Gyanendra agreed to relinquish sovereign power to the people. On 24 April 2006 the dissolved House of Representatives was reinstated. Using its newly acquired sovereign authority, on 18 May 2006 the House of Representatives unanimously voted to curtail the power of the king and declared Nepal a secular state, ending its time-honoured official status as a Hindu Kingdom. On 28 December 2007, a bill was passed in parliament to amend Article 159 of the constitution – replacing "Provisions regarding the King" by "Provisions of the Head of the State" – declaring Nepal a federal republic, and thereby abolishing the monarchy.  The bill came into force on 28 May 2008. [ The Communist Party of Nepal (Maoist) won the largest number of seats in the Constituent Assembly election held on 10 April 2008, and formed a coalition government which included most of the parties in the CA. Although acts of violence occurred during the pre-electoral period, election observers noted that the elections themselves were markedly peaceful and "well-carried out". 
The newly elected Assembly met in Kathmandu on 28 May 2008, and, after a polling of 564 constituent Assembly members, 560 voted to form a new government,   with the monarchist Rastriya Prajatantra Party, which had four members in the assembly, registering a dissenting note. At that point, it was declared that Nepal had become a secular and inclusive democratic republic,  with the government announcing a three-day public holiday from 28 to 30 May.[ citation needed ] The King was thereafter given 15 days to vacate theNarayanhiti Royal Palace, to re-open it as a public museum. 
Nonetheless, political tensions and consequent power-sharing battles have continued in Nepal. In May 2009, the Maoist-led government was toppled and another coalition government with all major political parties barring the Maoists was formed.  Madhav Kumar Nepal of the Communist Party of Nepal (Unified Marxist-Leninist) was made the Prime Minister of the coalition government.  In February 2011 the Madhav Kumar Nepal Government was toppled and Jhala Nath Khanal of the Communist Party of Nepal (Unified Marxist-Leninist) was made the Prime Minister.  In August 2011 the Jhala Nath Khanal Government was toppled and Baburam Bhattarai of the Communist Party of Nepal (Maoist) was made the Prime Minister.