The invention relates to a portable on-site check meter for current transformers. The portable on-site check meter comprises a pincerlike current test meter (1) which is provided with a housing (2), a first current wire clamp (3), a first shift adjusting switch (4), a first current display screen (5) and a first current wire clamp switch (6) are arranged on the housing (2), and a first current transformer converting circuit (7) is arranged in the housing (2). A second shift adjusting switch (8), a second current display screen (9) and a calculator (10) are arranged on the housing (2), and the housing (2) is connected with a second current wire clamp (12) through a connecting wire (11). A second current wire clamp switch (13) is arranged on the current wire clamp (12), and a second current transformer converting circuit (14) is arranged in the housing (2) to combine the two pincerlike current test meters into one. The portable on-site check meter can test primary current and secondary current of a current transformer simultaneously.