A method for controlling a synchronous output of a digital matrix, including: when output units in the digital matrix are activated or an individual output unit in the output units is re-activated after an abnormality occurs in this individual output unit, calibrating output start times and output periods of the output units such that the output start times of the output units are identical and the output periods of the output units are identical; receiving, by the output units, to-be-processed data based on the identical output start times; and after the to-be-processed data is received, controlling the output units to complete the processing of the received to-be-processed data within a current output period, such that the output units output the processed data synchronously in a next output period, characterized in that the output units in the digital matrix are grouped into different synchronous output groups, each of the output units corresponds to one synchronous output group identifier, and output units in each of the different synchronous output groups have different configuration parameters from output units in the other synchronous output groups of the different synchronous output groups; J calibrating output start times and output periods of the output units such that the output start times of the output units are identical and the output periods of the output units are identical comprises: determining, according to a synchronous output group identifier to which each of the output units belongs, a synchronous output group to which each of the output units belongs; broadcasting the configuration parameters of the output units in each of different synchronous output groups and reconfiguring the parameters for the output units according to said broadcast parameters, such that output periods of the output units in this synchronous output group are identical (202, 302); and broadcasting an activation signal to the output units in each of different synchronous output groups, and controlling the output units in this synchronous output group to simultaneously activate an output time sequence, such that the output start times of the output units in this synchronous output group are identical (203, 303).. when output units in the digital matrix are activated or an individual output unit in the output units is re-activated after an abnormality occurs in this individual output unit, calibrating output start times and output periods of the output units such that the output start times of the output units are identical and the output periods of the output units are identical; receiving, by the output units, to-be-processed data based on the identical output start times; and after the to-be-processed data is received, controlling the output units to complete the processing of the received to-be-processed data within a current output period, such that the output units output the processed data synchronously in a next output period, characterized in that the output units in the digital matrix are grouped into different synchronous output groups, each of the output units corresponds to one synchronous output group identifier, and output units in each of the different synchronous output groups have different configuration parameters from output units in the other synchronous output groups of the different synchronous output groups; J calibrating output start times and output periods of the output units such that the output start times of the output units are identical and the output periods of the output units are identical comprises: determining, according to a synchronous output group identifier to which each of the output units belongs, a synchronous output group to which each of the output units belongs; broadcasting the configuration parameters of the output units in each of different synchronous output groups and reconfiguring the parameters for the output units according to said broadcast parameters, such that output periods of the output units in this synchronous output group are identical (202, 302); and broadcasting an activation signal to the output units in each of different synchronous output groups, and controlling the output units in this synchronous output group to simultaneously activate an output time sequence, such that the output start times of the output units in this synchronous output group are identical (203, 303).. determining, according to a synchronous output group identifier to which each of the output units belongs, a synchronous output group to which each of the output units belongs; broadcasting the configuration parameters of the output units in each of different synchronous output groups and reconfiguring the parameters for the output units according to said broadcast parameters, such that output periods of the output units in this synchronous output group are identical (202, 302); and broadcasting an activation signal to the output units in each of different synchronous output groups, and controlling the output units in this synchronous output group to simultaneously activate an output time sequence, such that the output start times of the output units in this synchronous output group are identical (203, 303)..