The invention discloses a method for negotiating group keys and equipment thereof, which belongs to the communication field. In the method, each subscriber in the group generates the same group keys by information interaction with other subscribers based on bilinear pairings mapping of elliptical curve by the method of selecting negotiating group keys according to the parity of total number of subscribers in the group. The equipment can be three types, wherein, one equipment comprises an information interaction module, an intermediate value generating module and a group key generating module;another equipment comprises an information interaction module, an intermediate value generating module, a conversation key generating module, a new intermediate value generating module and a group key generating module; and the third equipment comprises an information interaction module, an intermediate value generating module, a conversation key decoding module and an intermediate value encrypting module. The method and the equipment have small number of communication rounds during the process of key negotiation, thereby improving the immediacy of communication. Furthermore, the rounds number of key negotiation is independent of the number of members, so that the communication volume of the key negotiation is reduced.