Group decision-making is the typical form of democratic management for small-and -medium-sized enterprises. In order to achieve the unanimity of the group behavior, the participators in decision-making are influenced by the power of the owners and the authorities. As a result,, they are prone to make group misjudgments such as simple acceptance and negation and it will bring about the group decision-making risk . Realizing the disadvantage of group decision-making and adapting the mechanism, measures and tactics to prevent it is indispensable to im- prove the efficiency of decision-making of medium-sized and small-sized enterprises.