Arbitration without privity which appeared in the l980’s especially in ICSID incurred extensive controversies because of the absence of privity of both parties. Therefore it was considered to be lack of deficient theoretical origin. However, the development of international investment disputes settlement practices proves the demand of this arbitration itself. It is better to study the problems which this mode of arbitration would bring forth especially on the jurisdiction which influences the backward proceeding dramatically rather than critically denied the existence of the arbitration without privity. The deletion of the provision of applicable law rules by the arbitrator judged on the jurisdiction and the tedious objection procedure should be changed. The concrete applicable rules and new pre-trial procedure about the objection to the jurisdiction are presented in the article.