李大钊最为杰出的理论贡献就是提出了“社会主义必须应用于中国实际环境”的思想,这为马克思主义的中国化奠定了一定的理论基础。社会主义“理想应用于实境”的命题,不仅是一种可贵的科学精神,也是一种实践社会主义的具体方法论原则。这对当今建设有中国特色的社会实践具有很好的指导和启示作用,值得我们重视、理解、汲取并转化为建设有中国特色社会主义的巨大物质力量。 Li Dazhao’s most outstanding theoretical contribution is to put forward the idea that “socialism must be applied to China’s actual environment,” which lays a certain theoretical foundation for the sinicization of Marxism. The proposition that socialism “ideal is applied to reality ” is not only a precious scientific spirit but also a concrete methodological principle for practicing socialism. This is a good guide and inspiration for the social practice of building socialism with Chinese characteristics today and deserves our attention, understanding, absorption and transformation into the enormous material forces for building socialism with Chinese characteristics.