With the continuous development of business incubator nowadays, the existing evaluation method of enterprise incubator�s hatch ability has been unable to meet the needs of small and medium-sized enterprises. This paper proposes a small and medium-sized enterprise incubator�s hatch ability evaluation model based on multiclass method, this model introduced the principal component analysis and factor analysis, first, it selects small and medium-sized enterprise incubator�s hatch ability evaluation index, then it makes data conversion to these indicators, then it carries out the variable correlation analysis, and finally do the hatch ability evaluation. The experimental results show that the small and medium-sized enterprise incubator�s hatch ability evaluation model based on multiclass can evaluate effectively small and medium-sized enterprise incubator�s ability, that is to say this model is practical and effective.