Timing and time keeping accuracy test system

The utility model discloses a timing and time keeping accuracy test system comprising a merging unit (1), a high-accuracy time tester (2) and a GPS (global positioning system) synchronous timing device (3), wherein antennae (5) of the high-accuracy time tester (2) and the GPS synchronous timing device (3) are arranged outdoors; a B code timing output port (8) of the GPS synchronous timing device (3) is connected with a timing input port (9) of the merging unit (1); a sampling value optical fiber output port (10) of the merging unit (1) is connected with a sampling value optical fiber input port (11) of the high-accuracy time tester (2); and an output port (7) of sampling value output equipment (4) is connected with a sampling value input port (6) of the merging unit (1). By adopting the timing and time keeping accuracy test system disclosed by the utility model, the problem that a common user has difficulty in testing the timing and time keeping accuracies of the merging unit is solved, the test system is sim