Abstract:Standard essential patents are the necessary technologies for industry standards. The interest conflict between patent and standard is the reason of patent hijacking. Improper application of the patent holder will undermine the competition in the market and damage the legitimate interests of the standard implementers. The standard necessary patent holder has the obligation to license to the world, but patent hijacking is a breach of contracts. That a ban is issued on the basis of interest balance principle and the standard necessary patent licensing fees are determined properly will coordinate the interests of all parties. The legitimacy of the ban will be achieved by perfecting the laws and regulations.