A method for determining a downlink control information type, comprising: receiving, by a terminal device, downlink control information, DCI; and determining, by the terminal device, a type of the DCI according to a bit value of a first bit field in the DCI; wherein the DCI is a first type of DCI and a second type of DCI, the first type of DCI is used for scheduling data and indicating that the terminal device operates on a dormant bandwidth part, BWP, or a non-dormant BWP in a secondary cell, and the second type of DCI is used for indicating that the terminal device operates on the dormant BWP or the non-dormant BWP in the secondary cell, characterized in that the first bit field is a time domain resource assignment field, and the determining, by the terminal device, the type of the DCI according to the bit value of the first bit field in the DCI comprises: determining, by the terminal device, target information, according to a bit value of the time domain resource assignment field; and determining, by the terminal device, the type of the DCI according to the target information, wherein the target information comprises at least one of the following information: k0, k2, information of a time domain resource assignment table that needs to be read by the terminal device, L, S; wherein k0 represents a slot interval between a slot where the DCI is located and a slot of a physical downlink shared channel, PDSCH, scheduled by the DCI, and k2 represents a slot interval between the slot where the DCI is located and a slot of a physical uplink shared channel, PUSCH, scheduled by the DCI, L represents a number of symbols assigned by a time domain resource, and S represents a starting position of a time domain symbol used by the PDSCH or the PUSCH scheduled by the DCI. receiving, by a terminal device, downlink control information, DCI; and determining, by the terminal device, a type of the DCI according to a bit value of a first bit field in the DCI; wherein the DCI is a first type of DCI and a second type of DCI, the first type of DCI is used for scheduling data and indicating that the terminal device operates on a dormant bandwidth part, BWP, or a non-dormant BWP in a secondary cell, and the second type of DCI is used for indicating that the terminal device operates on the dormant BWP or the non-dormant BWP in the secondary cell, characterized in that the first bit field is a time domain resource assignment field, and the determining, by the terminal device, the type of the DCI according to the bit value of the first bit field in the DCI comprises: determining, by the terminal device, target information, according to a bit value of the time domain resource assignment field; and determining, by the terminal device, the type of the DCI according to the target information, wherein the target information comprises at least one of the following information: k0, k2, information of a time domain resource assignment table that needs to be read by the terminal device, L, S; wherein k0 represents a slot interval between a slot where the DCI is located and a slot of a physical downlink shared channel, PDSCH, scheduled by the DCI, and k2 represents a slot interval between the slot where the DCI is located and a slot of a physical uplink shared channel, PUSCH, scheduled by the DCI, L represents a number of symbols assigned by a time domain resource, and S represents a starting position of a time domain symbol used by the PDSCH or the PUSCH scheduled by the DCI. determining, by the terminal device, target information, according to a bit value of the time domain resource assignment field; and determining, by the terminal device, the type of the DCI according to the target information, wherein the target information comprises at least one of the following information: k0, k2, information of a time domain resource assignment table that needs to be read by the terminal device, L, S; wherein k0 represents a slot interval between a slot where the DCI is located and a slot of a physical downlink shared channel, PDSCH, scheduled by the DCI, and k2 represents a slot interval between the slot where the DCI is located and a slot of a physical uplink shared channel, PUSCH, scheduled by the DCI, L represents a number of symbols assigned by a time domain resource, and S represents a starting position of a time domain symbol used by the PDSCH or the PUSCH scheduled by the DCI.