This study would like to know how during Covid-19 international crude oil prices decline had affected the stocks and oil prices of Covid-19 in 2020. Used Taiwan, Japan, South Korea, China, Hong Kong, the United States, the United Kingdom and South Africa as the research objects. The subject of this article is the correlation between crude oil prices and the stock markets of Covid-19 during the period from 2019/3/1 to 2021/3/31. During Covid-19, crude oil prices fell by an average of US$6 to US$8 per barrel, the largest drop in 20 years. In March 2020, oil prices in West Texas fell by 27.54%. This study is to explore international crude oil prices and stock prices have been affected by Covid-19. The results of the study confirmed that the Covid-19 period had no impact on stocks. Have been impact on crude oil prices.