A resource determination method, the method comprises: determining resources of a transmission configuration indication, TCI, state according to TCI state resource allocation information notified by a network side; and determining a size of a precoded resource block group, PRG, according to the resources of the TCI state; the TCI state resource allocation information is notified by the network side by notifying a correspondence relationship between the TCI state and a preset resource allocation pattern, and the preset resource allocation pattern comprises at least first one RBG or RB is a group of resources, and the other RBGs or RBs are another group of resources; characterized in that: wherein the size of the PRG is determined in the following manner: when downlink control information sent by the network side indicates that a value of the size of the PRG is taken from set 1, and the set 1 is {2, a continuously scheduled bandwidth} or {4, the continuously scheduled bandwidth}: for any TCI state: if resources corresponding to the any TCI state are continuous and greater than or equal to BWP/4, or, resources corresponding to the any TCI state are continuous, and a sum of sizes of resources corresponding to a plurality of TCI states exceeds BWP/2, the size of the PRG is a size of the resources corresponding to the any TCI state, wherein BWP is a preset part of a bandwidth; otherwise, the size of the PRG is a value other than "the continuously scheduled bandwidth" in the set 1. determining resources of a transmission configuration indication, TCI, state according to TCI state resource allocation information notified by a network side; and determining a size of a precoded resource block group, PRG, according to the resources of the TCI state; the TCI state resource allocation information is notified by the network side by notifying a correspondence relationship between the TCI state and a preset resource allocation pattern, and the preset resource allocation pattern comprises at least first one RBG or RB is a group of resources, and the other RBGs or RBs are another group of resources; characterized in that: wherein the size of the PRG is determined in the following manner: when downlink control information sent by the network side indicates that a value of the size of the PRG is taken from set 1, and the set 1 is {2, a continuously scheduled bandwidth} or {4, the continuously scheduled bandwidth}: for any TCI state: if resources corresponding to the any TCI state are continuous and greater than or equal to BWP/4, or, resources corresponding to the any TCI state are continuous, and a sum of sizes of resources corresponding to a plurality of TCI states exceeds BWP/2, the size of the PRG is a size of the resources corresponding to the any TCI state, wherein BWP is a preset part of a bandwidth; otherwise, the size of the PRG is a value other than "the continuously scheduled bandwidth" in the set 1. if resources corresponding to the any TCI state are continuous and greater than or equal to BWP/4, or, resources corresponding to the any TCI state are continuous, and a sum of sizes of resources corresponding to a plurality of TCI states exceeds BWP/2, the size of the PRG is a size of the resources corresponding to the any TCI state, wherein BWP is a preset part of a bandwidth; otherwise, the size of the PRG is a value other than "the continuously scheduled bandwidth" in the set 1.