It is of scientific and practical importance，to do experimental research on the process of premixed gas explosion in linked vessels.In this paper，different firing positions，initial pressures and initial densities were investigated to obtain their impacts on gas explosion pressure in linked vessels.The results showed that if fuel was burned in a big vessel，a higher explosion pressure would result in the linked smaller one.The rate of pressure rise was also rapid.The influence of initial density on the linked vessels was basically consistent with that on a single vessel.If the initial pressure increased，explosion pressure in linked vessels increased as well.Furthermore，it increased more quickly in the small vessel than in the large one.Consequently，during the industrial process，the most effective method is the partition of explosion，that is，to install a separation device on the joint between the vessel and the connecting pipe to prevent explosion from spreading through pipes.