Walking disability in stroke patients is an important cause of falls. The assessment of walking function is a significant part of the functional evaluation for stroke patients. Traditional assessment methods, primarily based on observation and scales, are highly subjective and fail to achieve rapid and precise quantitative assessment. Walking function assessment technology based on wearable devices, as a rehabilitation assessment method that can provide real-time and continuous monitoring of gait and balance functions, helps in detecting the walking function and rehabilitation efficacy of stroke patients, and plays a positive role in predicting their prognosis. Therefore, wearable devices have broad application prospects in the assessment of post-stroke walking function. This article reviews the research progress of surface electromyography detection technology, wearable plantar pressure measurement technology, and wearable inertial measurement unit assessment technology in the evaluation of walking function after stroke.