The purpose of this study is to analyze the integration and response of the Islamic stock market of the OIC countries before the crisis and during the China stock market crisis also during the United States-China trade war with the Autoregressive Distributed Lag (ARDL) method. The results showed that there was no cointegration in the period before the China stock market crisis. However, during the period of the China stock market crisis and the United States-China trade war, the cointegration was more common. The Islamic stock market of Qatar, Saudi Arabia and the UAE experienced a domino effect from fluctuations in crude oil prices. Then, the Indonesia Islamic stock market in the two crisis periods had a long-term relationship with the US and China stock markets. Whereas the Malaysian and Bangladesh Islamic stock markets have only a long-term relationship with the US stock market. In terms of the benefits of portfolio diversification for investors, there is relevance of dominant economic, geographical, and trade relations in influencing the integration of the Islamic stock market.