A terminal capability negotiation method, comprising: in a multi-connection scene comprising a Long Term Evolution, LTE, network and a New Radio, NR, network, initiating, by a secondary serving base station, a User Equipment, UE, capability negotiation request to a master serving base station according to a local Secondary Cell Group, SCG, configuration requirement, wherein the UE capability negotiation request is used for negotiating about a UE particular capability on a SCG side; and receiving, by the secondary serving base station, a UE capability negotiation reply fed back by the master serving base station in response to the UE capability negotiation request; characterized in that, the UE capability negotiation request comprises: a requested absolute or relative amount of the UE particular capability, a cause of requesting the UE particular capability, in a case that a request for the UE particular capability is rejected by the master serving base station, whether the secondary serving base station is willing to accept a suggested value of the UE particular capability from the master serving base station, and a current actual consumption/occupation amount of a UE particular capability; when the secondary serving base station is willing to accept the suggested value of the UE particular capability from the master serving base station, the secondary serving base station receives a suggested value different from the value of the requested absolute or relative amount of the UE particular capability, which is given by the master serving base station based on the requested absolute or relative amount of the UE particular capability and the cause of requesting the UE particular capability, wherein the suggested value different from the value of the requested absolute or relative amount of the UE particular capability is comprised in the UE capability negotiation reply; and when the secondary serving base station is not willing to accept the suggested value of the UE particular capability from the master serving base station, the secondary serving base station receives a decision result whether the requested absolute or relative amount of the UE particular capability is agreed, which is given by the master serving base station based on the requested absolute or relative amount of the UE particular capability and the cause of requesting the UE particular capability, wherein the decision result is comprised in the UE capability negotiation reply. in a multi-connection scene comprising a Long Term Evolution, LTE, network and a New Radio, NR, network, initiating, by a secondary serving base station, a User Equipment, UE, capability negotiation request to a master serving base station according to a local Secondary Cell Group, SCG, configuration requirement, wherein the UE capability negotiation request is used for negotiating about a UE particular capability on a SCG side; and receiving, by the secondary serving base station, a UE capability negotiation reply fed back by the master serving base station in response to the UE capability negotiation request; characterized in that, the UE capability negotiation request comprises: a requested absolute or relative amount of the UE particular capability, a cause of requesting the UE particular capability, in a case that a request for the UE particular capability is rejected by the master serving base station, whether the secondary serving base station is willing to accept a suggested value of the UE particular capability from the master serving base station, and a current actual consumption/occupation amount of a UE particular capability; when the secondary serving base station is willing to accept the suggested value of the UE particular capability from the master serving base station, the secondary serving base station receives a suggested value different from the value of the requested absolute or relative amount of the UE particular capability, which is given by the master serving base station based on the requested absolute or relative amount of the UE particular capability and the cause of requesting the UE particular capability, wherein the suggested value different from the value of the requested absolute or relative amount of the UE particular capability is comprised in the UE capability negotiation reply; and when the secondary serving base station is not willing to accept the suggested value of the UE particular capability from the master serving base station, the secondary serving base station receives a decision result whether the requested absolute or relative amount of the UE particular capability is agreed, which is given by the master serving base station based on the requested absolute or relative amount of the UE particular capability and the cause of requesting the UE particular capability, wherein the decision result is comprised in the UE capability negotiation reply.