A crosstalk cancellation apparatus, wherein the apparatus comprises: a computing center and a cancellation module that are deployed in different physical locations, wherein the cancellation module comprises L cancellers, and L is a positive integer; the computing center is connected to the cancellation module through a first network interface, and is connected to a baseband chip through a second network interface; the computing center is configured to: calculate a crosstalk coefficient wherein the crosstalk coefficient is a matrix used to cancel crosstalk based on a status parameter and a channel physical parameter that are reported by the baseband chip, wherein the status parameter is used to indicate a status of each port in current online ports of the baseband chip and deliver the crosstalk coefficient to the cancellers in the cancellation module through the first network interface; and each canceller in the cancellation module is connected to at least one port of the baseband chip, each port of the baseband chip being connected to a CPE, and each canceller is configured to preprocess, based on the crosstalk coefficient, a crosstalk signal received through the at least one port; wherein: L is an integer greater than 1, and any two of the L cancellers are connected to each other through a third network interface; an i th canceller in the L cancellers is connected to N i ports of the baseband chip, i is a positive integer less than or equal to L, and N i is a positive integer; and the i th canceller is configured to: receive N i crosstalk signals through the N i ports, send the received N i crosstalk signals to each of the other L-1 cancellers through the third network interface, and preprocess the N i crosstalk signals based on the crosstalk coefficient and crosstalk signals sent by the other L-1 cancellers. a computing center and a cancellation module that are deployed in different physical locations, wherein the cancellation module comprises L cancellers, and L is a positive integer; the computing center is connected to the cancellation module through a first network interface, and is connected to a baseband chip through a second network interface; the computing center is configured to: calculate a crosstalk coefficient wherein the crosstalk coefficient is a matrix used to cancel crosstalk based on a status parameter and a channel physical parameter that are reported by the baseband chip, wherein the status parameter is used to indicate a status of each port in current online ports of the baseband chip and deliver the crosstalk coefficient to the cancellers in the cancellation module through the first network interface; and each canceller in the cancellation module is connected to at least one port of the baseband chip, each port of the baseband chip being connected to a CPE, and each canceller is configured to preprocess, based on the crosstalk coefficient, a crosstalk signal received through the at least one port; wherein: L is an integer greater than 1, and any two of the L cancellers are connected to each other through a third network interface; an i th canceller in the L cancellers is connected to N i ports of the baseband chip, i is a positive integer less than or equal to L, and N i is a positive integer; and the i th canceller is configured to: receive N i crosstalk signals through the N i ports, send the received N i crosstalk signals to each of the other L-1 cancellers through the third network interface, and preprocess the N i crosstalk signals based on the crosstalk coefficient and crosstalk signals sent by the other L-1 cancellers. L is an integer greater than 1, and any two of the L cancellers are connected to each other through a third network interface; an i th canceller in the L cancellers is connected to N i ports of the baseband chip, i is a positive integer less than or equal to L, and N i is a positive integer; and the i th canceller is configured to: receive N i crosstalk signals through the N i ports, send the received N i crosstalk signals to each of the other L-1 cancellers through the third network interface, and preprocess the N i crosstalk signals based on the crosstalk coefficient and crosstalk signals sent by the other L-1 cancellers.