This study provides a comprehensive review on the trend of precipitation research work over Pakistan. An integrated literature review is developed by combining the various content analysis to explore a systematic trend of precipitation studies in Pakistan. The review was extended up to Indian research work of precipitation to identify the role of affecting elements to regional precipitation of Pakistan. The review is focused on two national journals and eighteen international journals about geography, climate, and meteorology during 1981-2020. The proportion of reviewed articles was 84 and 16 percent for international and local journals respectively. Various features of precipitation research in international journals have rapidly increased during 2009-2020, which was four-time greater than research published during 1981-2008. Regarding various features of precipitation, the ratio of reviewed studies was 54%, 21%, 16%, and 6% for atmospheric circulation, annual and seasonal precipitation, extreme precipitation, and regional distribution of precipitation respectively. While the studies of climate change and its impact on human was not big in numbers in Pakistan. The review of precipitation studies revealed that the aspect of precipitation intensity was more focused on by climate scientists during the last three decades. The occurrence of precipitation intensity indicates an increasing trend of extreme events particularly in the central plain, northwestern mountain, and Kashmir region during the monsoon season. There is no specific research was studied to assess the trend shift changes of precipitation in the recent decades.