The invention discloses an isolation plate used for road construction and relates to the field of traffic engineering. The isolation plate is used for isolation a bearing platform and a roadbed. The isolation plate comprises a first base plate body and a second base plate body. The first base plate body is used for being connected with the bearing platform, and the second base plate body is used for being connected with the roadbed. Meanwhile, the first base plate body and the second base plate body can slide relatively. According to the isolation plate used for road construction, the bonding force between the roadbed and the bearing platform can be released, the restraint of the bearing platform on settling of the nearby roadbed is reduced, the phenomenon that the road surface near the bearing platform is bulged seriously is avoided, the bearing platform does not need to be deeply buried, the cost is saved, and the construction difficulty is lowered.