The burning behaviour of plantation grown wood （two softwoods and one hardwood） treated with boride（m（H,3,BO,3,）∶m（Na,2,B,4,O,7,）=1∶1） was tested by Cone Calorimeter in this study.The sample size of 100 mm by 100 mm（LT or LR section） by 10mm thick was prepared for fire retardant treatment and the cone calorimeter test.The heated area was on LT or LR section.The heat flux was 50 kW/m,2,.The results showed that the boride fire retardant was not satisfactory for retarding ignition,restraining heat release or reducing mass loss.But,the fire retardant treatment was quite effective in reducing smoke generation.