A Physical Downlink Control Channel (PDCCH) monitoring method, a PDCCH sending method, and a terminal are provided. The PDCCH monitoring method includes: obtaining first information; and monitoring a PDCCH repetition based on the first information. The first information includes at least one of the following: a first parameter; a second parameter; a third parameter; and a fourth parameter. The first parameter is used to indicate PDCCH repetition information. The PDCCH repetition information comprises at least one of the following: times of PDCCH repetition, a monitoring occasion of the PDCCH repetition, or duration of each PDCCH repetition. The second parameter is used to indicate whether to perform the PDCCH repetition. The third parameter is used to indicate P search spaces for the PDCCH repetition. P is a positive integer. The fourth parameter is used to indicate Q Control Resource Sets (CORESETs) for the PDCCH repetition. Q is a positive integer.