The abnormal gait after stroke was mainly related to the decreasing strength with increasing tension of paretic lower limb muscles. Surface electromyography (sEMG) can respond to the neuromuscular function, that is valuable for abnormal gait analysis for stroke patients. This paper mainly introduced the anatomical basis with sEMG features of walking, the performance of abnormal gait and abnormal gait analysis based on sEMG. It focused on the advances of sEMG in the analysis of temporal patterns and activating characteristics of muscles associated with abnormal gait, as well as abnormal gait pattern.