In order to study the effect of initial planting density on caloric value of Zenia insignis Chun, by both initial planting density test and sampling and testing of wood, the growth, biomass and caloric value of young Zenia insignis Chun were studied. The results suggested that the diameter at breast height, tree height and biomass of four-year old Zenia insignis Chun were significantly different. There was no significantly difference on caloric value of wood density effect. When the initial planting density was 10001-40002 plants per hm2, the caloric value of individual tree was 18200 J/g around. The initial planting density was 3334-6667 plants per hm2, the caloric value of individual tree was 19000 J/g around. When the initial planting density was 40002 plants per hm2, four-year old Zenia insignis Chun biomass reached 94.2 t per hm2, the total biomass were equated with 58.69 t standard coal. Zenia insignis Chun is a good fiber energy plants.