Disclosed in the present application are a channel detection method and device, and a computer storage medium. The method comprises: when N downlink bandwidth parts (BWPs) corresponding to a terminal are in an activated state, wherein an nth BWP in the N BWPs is provided with Cn control resource sets and Sn search space sets, the terminal determining K BWPs and/or





∑
n

⁢

Cn
′





control resource sets and/or






∑
n

⁢

Sn
′





search space sets according to indication information or a preset rule of a network device, N≥2, 1≤n≤N, 0≤K≤N, 0≤Cn′≤Cn, 0≤Sn′≤Sn; and the terminal performing detection on a downlink control channel in the K BWPs and/or the






∑
n

⁢

Cn
′





control resource sets and/or the






∑
n

⁢

Sn
′





search space sets.