The invention provides an ultra-high voltage direct current multi-data-source parameter actual measurement and checking method. The method is characterized by comprising the steps that various data sources are subjected to different-link actual measurement and overall checking in sequence; in the step of different-link actual measurement, a control module is decoupled according to the characteristics of an ultra-high voltage direct current model, and the parameter of one module is obtained through actual measurement of one experiment data; in the step of overall checking, data is disturbed through faults, the integral time constant Ti_I of current control and parameters of a low-voltage current limiting control module are checked, and meanwhile parameters of other links are checked from the overall characteristic; the multiple data sources comprise actual power grid experiments, actual control and protection united experiments and control and protection digital model simulation. The direct-current transmission simulation modeling technical level is improved, the problem that determining of ultra-high voltage direct current simulation computing parameters lacks basis is solved, and a technical gap is filled.