The invention discloses a method for continuously isomerizing bridge type tetrahydrotricyclopentadiene into hanging tetrahydrotricyclopentadiene. The method includes the following steps that a mixture of bridge type tetrahydrotricyclopentadiene and bridge type tetrahydro-dicyclopentadiene and a solvent disperse system containing 5-80 wt% of catalyst are injected into a reactor at constant speed for an isomerization reaction, the reaction temperature is 20-80 DEG C, and the air speed of the reactor is 2-0.5 h<-1>. According to the preparation method, continuous feeding and discharging are achieved, the yield of products is increased, and the production cost is reduced.