A method for data transmission, comprising: receiving, by a terminal device, indication information from a network device, the indication information indicating a first downlink scheduling time-domain resource in a first time-frequency resource region and a frequency-domain resource in the first time-frequency resource region being a part of a system bandwidth, the first time-frequency resource region corresponding to a scheduling unit on a time domain, and the frequency-domain resource in the first time-frequency resource region being part of the system bandwidth, wherein the indication information is configured to indicate a starting symbol, time-domain length and ending symbol of the first downlink scheduling time-domain resource for data transmission; and receiving, by the terminal device, data from the network device on the first downlink scheduling time-domain resource for data transmission according to the indication information; wherein a plurality of time-frequency resource regions comprising the first time-frequency resource region for the terminal device are received from the network device, the plurality of time-frequency resource regions have different subcarrier spacings, the indication information contains information about a third downlink scheduling time-domain resource in a third time-frequency resource region, the third time-frequency resource region is a time-frequency resource region with a minimum subcarrier spacing in the plurality of time-frequency resource regions and the plurality of time-frequency resource regions are located in different frequency bands in a same time-domain resource, and the method further comprises: determining, by the terminal device, an ending moment of the third downlink scheduling time-domain resource for data transmission according to the indication information, and determining, by the terminal device, a moment corresponding to the ending symbol of the first downlink scheduling time-domain resource for data transmission as the ending moment of the third downlink scheduling time-domain resource for data transmission. receiving, by a terminal device, indication information from a network device, the indication information indicating a first downlink scheduling time-domain resource in a first time-frequency resource region and a frequency-domain resource in the first time-frequency resource region being a part of a system bandwidth, the first time-frequency resource region corresponding to a scheduling unit on a time domain, and the frequency-domain resource in the first time-frequency resource region being part of the system bandwidth, wherein the indication information is configured to indicate a starting symbol, time-domain length and ending symbol of the first downlink scheduling time-domain resource for data transmission; and receiving, by the terminal device, data from the network device on the first downlink scheduling time-domain resource for data transmission according to the indication information; wherein a plurality of time-frequency resource regions comprising the first time-frequency resource region for the terminal device are received from the network device, the plurality of time-frequency resource regions have different subcarrier spacings, the indication information contains information about a third downlink scheduling time-domain resource in a third time-frequency resource region, the third time-frequency resource region is a time-frequency resource region with a minimum subcarrier spacing in the plurality of time-frequency resource regions and the plurality of time-frequency resource regions are located in different frequency bands in a same time-domain resource, and the method further comprises: determining, by the terminal device, an ending moment of the third downlink scheduling time-domain resource for data transmission according to the indication information, and determining, by the terminal device, a moment corresponding to the ending symbol of the first downlink scheduling time-domain resource for data transmission as the ending moment of the third downlink scheduling time-domain resource for data transmission. determining, by the terminal device, an ending moment of the third downlink scheduling time-domain resource for data transmission according to the indication information, and determining, by the terminal device, a moment corresponding to the ending symbol of the first downlink scheduling time-domain resource for data transmission as the ending moment of the third downlink scheduling time-domain resource for data transmission.