A communication method, performed by a communication apparatus, wherein the method comprises: receiving first indication information from a network device, wherein the first indication information indicates a time domain position of a demodulation reference signal, DMRS, set on a physical downlink shared channel, PDSCH; and the DMRS set comprises N DMRSs, wherein N is a positive integer greater than or equal to 2; and receiving, on the PDSCH based on the first indication information, data sent by the network device. the method being characterized in that when N is 2, the DMRS set comprises a first DMRS and a second DMRS, and a length of the first DMRS and a length of the second DMRS in time domain each are one symbol, the first indication information indicates: a PDSCH mapping type being a type B; when L is 9, l 0 is 0 and Δl 1 is 7 and when L is 10, l 0 is 0 and Δl 1 is 7; or when N is 3, the DMRS set comprises a first DMRS, a second DMRS, and a third DMRS, and a length of the first DMRS, a length of the second DMRS, and a length of the third DMRS in time domain each are one symbol, the first indication information indicates: a PDSCH mapping type being a type B; when L is 9, l 0 is 0, Δl 1 is 4 and Δl 2 being 7 and when L is 10, l 0 is 0, Δl 1 is 4 and Δl 2 is 7; wherein L is used to indicate a total quantity of symbols of the PDSCH; l 0 is used to indicate a start symbol of the first DMRS on the PDSCH; Δl 1 is used to indicate a quantity of symbols between a start symbol of the PDSCH and a start symbol of the second DMRS on the PDSCH; and Δl 2 is used to indicate a quantity of symbols between the start symbol of the PDSCH and a start symbol of the third DMRS on the PDSCH. wherein the method comprises: receiving first indication information from a network device, wherein the first indication information indicates a time domain position of a demodulation reference signal, DMRS, set on a physical downlink shared channel, PDSCH; and the DMRS set comprises N DMRSs, wherein N is a positive integer greater than or equal to 2; and receiving, on the PDSCH based on the first indication information, data sent by the network device. the method being characterized in that receiving first indication information from a network device, wherein the first indication information indicates a time domain position of a demodulation reference signal, DMRS, set on a physical downlink shared channel, PDSCH; and the DMRS set comprises N DMRSs, wherein N is a positive integer greater than or equal to 2; and receiving, on the PDSCH based on the first indication information, data sent by the network device. when N is 2, the DMRS set comprises a first DMRS and a second DMRS, and a length of the first DMRS and a length of the second DMRS in time domain each are one symbol, the first indication information indicates: a PDSCH mapping type being a type B; when L is 9, l 0 is 0 and Δl 1 is 7 and when L is 10, l 0 is 0 and Δl 1 is 7; or when N is 3, the DMRS set comprises a first DMRS, a second DMRS, and a third DMRS, and a length of the first DMRS, a length of the second DMRS, and a length of the third DMRS in time domain each are one symbol, the first indication information indicates: a PDSCH mapping type being a type B; when L is 9, l 0 is 0, Δl 1 is 4 and Δl 2 being 7 and when L is 10, l 0 is 0, Δl 1 is 4 and Δl 2 is 7; wherein L is used to indicate a total quantity of symbols of the PDSCH; l 0 is used to indicate a start symbol of the first DMRS on the PDSCH; Δl 1 is used to indicate a quantity of symbols between a start symbol of the PDSCH and a start symbol of the second DMRS on the PDSCH; and Δl 2 is used to indicate a quantity of symbols between the start symbol of the PDSCH and a start symbol of the third DMRS on the PDSCH. a PDSCH mapping type being a type B; when L is 9, l 0 is 0 and Δl 1 is 7 and when L is 10, l 0 is 0 and Δl 1 is 7; or when N is 3, the DMRS set comprises a first DMRS, a second DMRS, and a third DMRS, and a length of the first DMRS, a length of the second DMRS, and a length of the third DMRS in time domain each are one symbol, the first indication information indicates: a PDSCH mapping type being a type B; when L is 9, l 0 is 0, Δl 1 is 4 and Δl 2 being 7 and when L is 10, l 0 is 0, Δl 1 is 4 and Δl 2 is 7; wherein L is used to indicate a total quantity of symbols of the PDSCH; l 0 is used to indicate a start symbol of the first DMRS on the PDSCH; Δl 1 is used to indicate a quantity of symbols between a start symbol of the PDSCH and a start symbol of the second DMRS on the PDSCH; and Δl 2 is used to indicate a quantity of symbols between the start symbol of the PDSCH and a start symbol of the third DMRS on the PDSCH. a PDSCH mapping type being a type B; when L is 9, l 0 is 0, Δl 1 is 4 and Δl 2 being 7 and when L is 10, l 0 is 0, Δl 1 is 4 and Δl 2 is 7; wherein L is used to indicate a total quantity of symbols of the PDSCH; l 0 is used to indicate a start symbol of the first DMRS on the PDSCH; Δl 1 is used to indicate a quantity of symbols between a start symbol of the PDSCH and a start symbol of the second DMRS on the PDSCH; and Δl 2 is used to indicate a quantity of symbols between the start symbol of the PDSCH and a start symbol of the third DMRS on the PDSCH.