The invention discloses a business seizing method, a business seizing device and a base station, wherein the method comprises the following steps of receiving a business request; when the type of belonged UE (Unified Equipment) of a business is judged as carrier-aggregation UE, carrying out splitting processing on an E-RAB (Evolved-Radio Access Bearer) of an E-UTRAN (Evolved-Universal Terrestrial Radio Access Network) carried in the business request according to acquired radio-resource state information; judging whether the business is accessed or not according to the E-RAB accepting result of a main district, the business seizing result of the main district and the E-RAB establishing result of an auxiliary district, and responding to the business request; judging whether the seized business is released or not according to the processing result of the seized business. According to the business seizing method, the business seizing device and the base station, the business seizing is realized for the carrier-aggregation UE, so that the E-RAB establishing success rate is increased, the call drop rate of the business is decreased, and the user experience is further improved.