The invention relates to a method of improving 1000kV transmission line induction voltage and current calculation precision. The method technical comprises the following steps: according to a line transposition mode and soil resistivity information, an electromagnetic transient program is adopted to build a 1000kV transmission line induction voltage and current calculation simulation model; the head end and the tail end of each line are short-circuited and grounded, and electromagnetic induction current under a different operation line power flow is measured; the head end and the tail end of each line are open circuited, and electrostatic induction voltage under a different operation line power flow is measured; one end of each line is short-circuited and grounded and the other end is open circuited, and the electromagnetic induction voltage and the electrostatic induction current under a different operation line power flow are measured. The method of the invention has the advantages that the design is reasonable; the 1000kV transmission line induction voltage and current calculation precision can be effectively improved; and the personal safety of a line parameter measurement test person can be ensured.