The invention discloses a combustibility evaluation method of metal powder and a solvent mixture thereof. The method comprises the following steps: firstly, standing a mixture and observing whether the mixture has a solvent layer or not; if so, testing a closed cup flash point of the solvent layer; if a measured closed cup flash point value is more than 60 DEG C, determining that the mixture is a common chemical; if the measured closed cup flash point value is smaller than 60 DEG C, determining that the mixture is flammable liquid; secondly, combusting metal powder without the solvent layer; testing a solid combustion speed of the metal powder; if a measured combustion speed value is more than 2.2mm/s, determining that the metal powder is a flammable solid; then, measuring a closed cup flash point of a mixture with the measured combustion speed value smaller than 2.2mm/s; if the measured closed cup flash point value is more than 60 DEG C, determining that the mixture is the common chemical; finally, continuously combusting the mixture with the closed cup flash point value smaller than 60 DEG C and observing whether the mixture is continuously combusted or not; if so, determining that the mixture is the flammable solid; otherwise, determining that the mixture is the common chemical. The method disclosed by the invention has the advantages of reliable evaluation results and stable utilization conditions.