Abstract：Chronic non-specific lumbago is one of the common diseases in the rehabilitation clinic. Due to its specific pathological mechanism has not been fully elucidated，the current clinical treatment is mainly symptomatic treatment. According to the characteristics of non- specific lumbago ， Director ZHANG Haifeng combined with his own clinical experience and believed that it is mainly caused by the disharmony between body and function. The human body takes the original qi as the "body"，and the external functions of zang-fu organs，channels and collaterals as the "function". The spleen and kidney are of depletion，and fail to transport and transform， and then the qi transformation gets abnormal， and qi and blood are deficient. The original qi becomes deficiency and declines，and the lost of nutrients leads to pain，which manifests as lumbago. Qi deficiency and blood stasis， obsturction of meridians nd viscera， or further invasion by pathogenic qi，blockage and stagnation of cold and dampness，stagnation leading to pain，are all causing deficiency in the origin and excess in the superficiality. According to this，Director ZHANG put forward the therapeutic principles of unblocking and supplementing the original qi，and dissolving stasis and relieving pain， and combined with Chinese and western medicine and rehabilitation physical therapy， whose therapeutic effect is significant.