Abstract: There exists many problems in boiler fueling on Orimulsion as there are 30% water content, more ash and corrosive compositions in Orimulsion, such as the problems of effect on boiler s thermal load resulting in ash accumulation over heated surface and low boiler efficiency, smoking producing, boiler tube corrosion and smoking desulfurization, etc. Aiming at the above problems, analyzed basic physical properties of Orimulsion and put forward relevant improving measures, including a necessary reforming to boiler's self structure and combustion equipment. Although many technical problems will be occur from using Orimulsion as boiler's fuel, it is superior over heavy oil and coal for combustion in the aspects of environmental and economic efficiencies. If continuous improvement is made in combustion process, comprehensive efficiency in boiler's combustion shall be raised.