The present invention discloses a current transformer error check test system. The system comprises: P1 and S1 experiment terminals which are respectively accessed into the primary side and the secondary side of the current transformer; A, B, C and N test terminals which are accessed into the load side of the current transformer for automatic test of A, B and C single phase direct current resistance data and AB, BC and AC interphase direct current resistance data through program control; a database which comprises a power system basic data and a calculating formula through recording; a CPU capable of intelligently reading test data, taking the power system basic data and the calculating formula, rapidly calculating whether the current transformer accords with a relay protection requirement or not and automatically generating a form through adoption of the experiment data and the conclusion; a display configured to display test data and the form; and a USB port configured to export the form. The current transformer error check test system can effectively change the present situations that the current transformer error check test workload is large and it is easy to make mistake, and greatly mitigate the complicated workload.