Exclusion of illegal evidence by the procuratorial organs must be seamless to link with procedural stages of investigation, arrest, prosecution, and trial, because it is referred as procedural issues and the pre-trial step, so it can adopt the method of free proof, but owning to overall entity of three judicial authorities and legal supervision status of procuratorial organs in China, it is reasonable to cautiously adopt strict proof method, specifically by means of written examination, oral examination, and of obtaining, reviewing the vedio-audio recording of interrogation and so on. The working mechanism of procuratorial organs’s exclusion of illegal evidence gives priority to have a prosecutor as a undertaker, the department to discuss and the chief prosecutor to decide, with coordinating mechanisms between supervisor and subordinate, among different departments as a supplement. Procuratorial organ excluding illegal evidence in direction to the supervision or accusation may intensify the conflicts between the prosecutors and polices, prosecutors and courts.