Alkali-activated cementitious materials were prepared with NaOH and sodium silicate as alkali activator, alkali slag, slag powder and lime as raw material. Effect of the amount of alkali slag and activator catalog on compression strength of the material was investigated. The results showed that NaOH had no stimulating effect and sodium silicate had stimulating effect. NaOH and sodium silicate had stimulating effect on mixture of alkali slag and slag powder, but the excitation intensity is different in different age. The strength of the material increased with the content of slag powder increasing while NaOH is used as activator. The strength of materials reached the maximum with alkali slag and powder in a certain proportion while sodium silicate is used as activator.