Multiple system atrophy (MSA) is a debilitating and fatal neurodegenerative disorder and symptomatic therapeutic strategies are still limited.The parkinsonian type of MSA (MSA-P) has parkinsonian symptoms as its prominent manifestation, although Deep brain stimulation (DBS) at the subthalamic nucleus or globus pallidus interna has been an established treatment for Parkinson's disease patients, it is mostly ineffective in MSA-P patients, the improvement in motor function as short-lasting and rapidly followed by the early appearance of freezing of gait (FOG) and postural instability that counteracted DBS benefits and often leads to significant disability and loss of quality of life. Recently, some pilot studies demonstrated the safety and significant therapeutic outcome of SCS for FOG.The purpose of this clinical study is to understand the effectiveness of DBS combined with SCS for symptomatic treatment of MSA-P.