A data receiving method, comprising: receiving, by a wireless local area network, WLAN, receiving device by using a first radio frequency module through a first channel, first data that is sent by a WLAN sending device, wherein the first data is all or a part of original data, the original data comprises an original information field and an original check field, the original check field is a result of checking the original information field, and the first channel belongs to a WLAN channel; receiving, by the WLAN receiving device by using a second radio frequency module through a second channel, second data that is sent by the WLAN sending device, wherein the second data is all or a part of the original data, the second channel belongs to the WLAN channel, a frequency of the second channel is different from a frequency of the first channel, the second radio frequency module is different from the first radio frequency module, and the second data is different from the first data; obtaining, by the WLAN receiving device, a received information field based on an information field of the received first data and/or an information field of the received second data; obtaining, by the WLAN receiving device, a received check field based on a check field of the received first data and/or a check field of the received second data; and attempting, by the WLAN receiving device, to check the received information field by using the received check field to obtain the original information field, wherein the received first data comprises a first information field and a first check field, the received second data comprises only a second check field, and the received information field is the first information field, or the received first data comprises a first information field and a first check field, the received second data comprises only a second information field, and the received check field is the first check field. receiving, by a wireless local area network, WLAN, receiving device by using a first radio frequency module through a first channel, first data that is sent by a WLAN sending device, wherein the first data is all or a part of original data, the original data comprises an original information field and an original check field, the original check field is a result of checking the original information field, and the first channel belongs to a WLAN channel; receiving, by the WLAN receiving device by using a second radio frequency module through a second channel, second data that is sent by the WLAN sending device, wherein the second data is all or a part of the original data, the second channel belongs to the WLAN channel, a frequency of the second channel is different from a frequency of the first channel, the second radio frequency module is different from the first radio frequency module, and the second data is different from the first data; obtaining, by the WLAN receiving device, a received information field based on an information field of the received first data and/or an information field of the received second data; obtaining, by the WLAN receiving device, a received check field based on a check field of the received first data and/or a check field of the received second data; and attempting, by the WLAN receiving device, to check the received information field by using the received check field to obtain the original information field, wherein the received first data comprises a first information field and a first check field, the received second data comprises only a second check field, and the received information field is the first information field, or the received first data comprises a first information field and a first check field, the received second data comprises only a second information field, and the received check field is the first check field.