The global pandemic of coronavirus disease 2019 (COVID-19) remains challenging as it shows no signs of abating in key countries, but resurgence in European and East Asian regions. On July 23, the cumulative number of confirmed cases worldwide exceeded 15 million. The coronavirus pandemic has rebounded in some parts of China. In particular, there many outbreaks of cluster infections at home and abroad recently and SARS-CoV-2 have been detected positive in multiple environment samples. The role of environmental factors in the transmission of COVID-19 has attracted widespread attention. This article summarized the research progress of various environmental factorssuch as meteorological factors (temperature, humidity, and wind speed), contaminated water and drinking water, air, surfaces, food, food packages, and food processors, and insects affecting the transmission of COVID-19, emphasizing that environmental sanitation is one of the keys to controlling rebound and large-scale transmission of the pandemic, and proposed corresponding prevention and control recommendations.