Bangladesh is a Muslim country, and Muslims represent 90% of the entire population. But the problem is that many of them do not follow the Qur'an and Sunnah correctly. As well as they do not follow the law (Shariah) of Almighty Allah SWT. Some of them do not care about religion at all; they are Muslims in the name only. And some of them are interested in religion, and many of them follow the Quran and Sunnah in religious matters only. As for the worldly matters, they do not pay attention to them. And some of them are interested in religion but they are fanatics of a particular doctrine, and dominated by deviation (Bidaah), superstition and polytheism. And some of them adhere to the religion of Islam in general, both in the worldly and religious matters keeping far from Shirk (polytheism) and deviation (Bidaah) being committed to seek the right. They are very few. The reason behind these problems is the absence of the Islamic Dawah on the correct method, and there are also problems in the field of Islamic Dawah. I want to clarify these problems along with the ways of solution on the correct method. In this article, I will focus on Bangladesh, the entry of Islam in it, and the problems of Islamic Dawah in Bangladesh along with the obstacles and problems related to the Islamic Dawah, the lack of comprehensive projects in the Islamic Dawah, and the lack of a sense of Islamic Dawah and some facts which are related to the character of the invited individuals and society, such as ignorance of the mass people about Islam, the non-conformity of the Islamic law in the daily life of Muslims. And the indirect obstacles and problems that prevent and counteract the work of Islamic Dawah exist such as the emergence of the enemies of Islam and their negative impact in the name of Islamic Dawah, and the existence of missionary activities of other religions such as Christianization, secularism and Dahriya. And the impact of the British occupation in the educational system and government, and the lack of moral values in education and publication, cultural colonization, the capitalist and interest-based banking system, and the sedition of women, the existence of a widespread group of deviation (followers of Bidaah), and inborn disintegration. However, there are the expected probability of solving Dawah problems, the proposed solution to overcome these problems, and proposed solutions to funding problems in the field of Dawah. Keywords: Problem, Islamic Dawah, Bangladesh, Solution