Disclosed are a method for data transmission, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product and a computer program. The method comprises: determining, according to data channel configuration information corresponding to a control resource set (CORESET) or a search space, a transmission parameter of a data channel; and transmitting or receiving, based on the transmission parameter, the data channel, wherein the CORESET or the search space is a CORESET or a search space where downlink control information (DCI) used for scheduling the data channel is detected, or, the CORESET or the search space is a CORESET or a search space that uses the same quasi-co-location (QCL) type D assumption as a control channel for scheduling the data channel.