Due to the non-uniqueness and uncertainty of coal in power plants

the multi-objective decision-making(TOPSIS)method was put forward to evaluate the coal blending scheme comprehensively.Against eight coal mixing schemes

this method regarded six parameters(ash content

volatile content

ignition temperature

calorific value

price and ash fusion point)as ther performance indexes to construct the decision matrix

and ascertained the performance indexex'weight by applying informational entropy.Then

the weighted standard decision matrix was built

and the most ideal index's weighted value set and the most un-ideal index's weighted value set were obtained.Finally

the result of comprehensive evaluation of eight coal blending schemes was produced by the conjecture of close degree between the preliminary schemes and the positive-negative ideal weighted value.