The invention discloses a mixed type plastic track construction method which can effectively improve the cohesive property of a plastic surface course and an asphalt concrete base layer, so that the layer separation phenomenon on the plastic coat can be avoided. The mixed type plastic track construction method is characterized by comprising the following steps of: coating mixed aggregate on the surface of the asphalt concrete base layer, paving plastic sizing agent on the binding layer formed after the mixed aggregate is fully dried to form the plastic surface course, and then spraying colloidal particles on the plastic surface course being not fully cured. The mixed aggregate is formed by mixing the following materials in parts by weight: 3 to 4 parts of quartz sand or colloidal particleand 6 to 7 parts of plastic aggregate, and the weight percentage of the water in the mixed aggregate no more than 0.1%. The experiment proved that because the mixed aggregate has good compatibility with the asphalt concrete base layer and good cohesive property with the plastic surface course at the same time, the binding surface is permeated and moistened, the cohesive property of the plastic surface course and the asphalt concrete base layer can be improved, and the layer separation phenomenon on the plastic surface course can be avoided.