Cell switching method and device

The invention discloses a cell switching method and device. The cell switching method and device is used in a satellite communication system and enables switching of a user to be low in synchronization time error and high in success rate. Meanwhile, according to the cell switching method and device, in a switching process, excessive occupancy of resources is avoided, and the using rate of the resources is improved. The cell switching method comprises the following steps: network-side equipment sends a synchronization parameter of a target spot beam to user equipment (UE) to instruct the UE to stay synchronous with the target spot beam, the network-side equipment then acquires position information of the UE and power information of the spot beam, and then the network-side equipment judges whether to carry out cell switching on the UE or not according to the position information of the UE and the power information of the spot beam, wherein the position information of the UE and the power information of the spot beam are reported by the UE.