Based　on　the　non-equilibrium　molecular　dynamics　simulation　method　(NEMD),　the　present　paper　investigated　the　thermal　rectification　effect　in　the　solid-liquid　interface　system.　The　thermal　rectification　model　is　proposed　by　using　the　temperature-dependent　adsorption　effect　of　the　fluid　molecules　on　the　solid　surface.　The　influence　of　the　solid-liquid　interaction　intensity　on　the　thermal　rectification　is　examined　by　MD　simulations.　It　is　found　that　the　heat　flux　from　liquid　to　solid　is　higher　than　that　in　the　opposite　direction　for　weak　solid-liquid　interaction　strength,　while　the　heat　flux　from　solid　to　liquid　can　be　much　larger　for　strong　solid-liquid　interaction　strength.　Therefore,　the　thermal　rectification　effect　in　the　solid-liquid　interface　can　be　reversed.　©　2020,　Science　Press.　All　right　reserved.