The invention relates to a turnout curved switch rail plane linetype which is composed of a straight line portion and a curve portion. The curved switch rail plane linetype is a combination of a straight line and a curve. The linetype of the working edge of a switch rail portion is a straight line section from the actual tip of a switch rail to the actual starting point of a curve section, and the distance bq from the actual starting point of the curve section to the working edge of a stock rail is larger than the maximum impact section width delta of a wheel at the time of reverse turnout entry; the linetype of the working edge from the actual starting point of the curve section to the heel of the switch rail is also a curve section; the angle of shock formed by the working edge of the straight line section and the working edge of the curve section meets the formula that (Vc * sin beta c) <2> is less than 0.8 (km/h) <2>, wherein Vc refers to the allowed lateral passing velocity of a train, and beta c refers to the angle of shock. According to the turnout curved switch rail plane linetype, on the premise that the dynamic indexes meet requirements when the train laterally passes through a turnout, the railhead width of a weak section of the curved switch rail can be increased remarkably, the wear resistance of the curved switch rail is improved, and therefore the service life of the curved switch rail is prolonged. The turnout curved switch rail plane linetype can be widely applied to heavy haul railway turnouts, urban rail transit turnouts, speed-raising turnouts and other turnout structures with a high requirement for the service life of switch rails.