The invention discloses a method and equipment for treating solid waste containing semi-volatile organic contaminant. The technical problem to be solved is that middle-and-high-concentration semi-volatile organic contaminant is subjected to one-time innocent treatment. The method for treating the solid waste comprises the following steps of: crushing, performing thermal desorption, condensing, performing extraction separation, and treating by a plasma reactor. The equipment for treating the solid waste consists of crushing equipment, a thermal desorption device, a condenser, an extractor, an adsorption tower, a high-pressure pump, a spray gun, the plasma reactor and a gas purification system. Compared with the prior art, the method has the advantages that: the thermal desorption and plasma pyrolysis are combined, the semi-volatile organic contaminant is subjected to one-time innocent treatment, the treatment efficiency is high, cost is low, secondary pollution is avoided, and soil, sludge and other solid waste which are polluted by persistent organic pollutants (POPs) can be effectively treated.