This book examines procedural trials using the procedure of excluding illegal evidence as an example. Criminal trials include both substantive and procedural trials. The former focuses on the criminal responsibility of the defendant, while the latter aims to resolve procedural disputes between the prosecution and the defense. The illegal evidence exclusion process is a typical procedural trial that examines the lawfulness of evidence taking and excludes illegally obtained evidence. The object of the study is the procedural rules of excluding illegal evidence in China. This book is innovative in that it examines the nature, function, subject matter, and litigation structure of procedural trials, and the relationship between procedural and substantive procedures. Moreover, the book compares various countries' procedure of excluding illegal evidence and examines the initiation, trial, rules of evidence, and appeals of the procedure of excluding illegal evidence in China.