Abstract: The situation where high speed railway and intercity rail transit are laid on the same bridge crossing the river at close distance has no precedent cases in the domestic construction of intercity rail transit lines. The safety hazards caused by electromagnetic induction are particularly noticeable. In view of the situation that high speed railway and intercity rail transit are passing through the same bridge, the electromagnetic influence of high speed railway on intercity rail transit is quantitatively analyzed and calculated, on the basis of which, design scheme of the induced voltage absorption device is given. Functions and component selection of the device are expounded.