Method for obtaining hydrocarbons from recyclable polyolefin-plastics by means of cracking, wherein (i) the recyclable plastics are supplied to a mixing container by using a feeding system under exclusion of air or in inert gas, respectively, inside which mixing container they are mixed with diesel oil to form a first liquid phase or dispersion, a plastic/oil-mixture, and subsequently are supplied one after the other to three heating zones or heat exchangers (4, 5, 6), respectively, and a cracking reactor, wherein (ii) the major part of the product oil is removed and guided back into the mixing container or the product-oil inlet pipe before the inlet into a first heating zone but after a pump which pumps this first liquid phase or dispersion into a subsequent row of three heating zones, (iii) in a first heating zone or a first heat exchanger, respectively, water vapour is evacuated in a first gas phase at 105 to 125°C, (iv) in a second heating zone or a second heat exchanger, respectively, a separation in - a second gas phase which consists primarily of acidic gases and is removed via a degassing dome, and - a second liquid phase or dispersion, where a part of the recyclable plastics is present as melt, is carried out at a temperature of 180 to 250°C, (v) in a third heating zone or a third heat exchanger, respectively, the second liquid phase is melted further at a temperature of 300°C to 380°C and subsequently, together with already formed vapour containing hydrocarbons, (vi) supplied to a cracking reactor inside which the melted hydrocarbons are cracked at around 400°C in a purely thermolytic way, wherein the gaseous hydrocarbons are supplied to a partial condenser inside which long-chained hydrocarbons condens and are returned to the third heating zone or the third heat exchanger, respectively, (vii) the gases are supplied from the partial condenser to a distillation column, inside which they are separated in a gaseous and a liquid fraction and from which the liquid fraction is removed as product diesel and the gaseous fraction as low boiler. (i) the recyclable plastics are supplied to a mixing container by using a feeding system under exclusion of air or in inert gas, respectively, inside which mixing container they are mixed with diesel oil to form a first liquid phase or dispersion, a plastic/oil-mixture, and subsequently are supplied one after the other to three heating zones or heat exchangers (4, 5, 6), respectively, and a cracking reactor, wherein (ii) the major part of the product oil is removed and guided back into the mixing container or the product-oil inlet pipe before the inlet into a first heating zone but after a pump which pumps this first liquid phase or dispersion into a subsequent row of three heating zones, (iii) in a first heating zone or a first heat exchanger, respectively, water vapour is evacuated in a first gas phase at 105 to 125°C, (iv) in a second heating zone or a second heat exchanger, respectively, a separation in - a second gas phase which consists primarily of acidic gases and is removed via a degassing dome, and - a second liquid phase or dispersion, where a part of the recyclable plastics is present as melt, is carried out at a temperature of 180 to 250°C, - a second gas phase which consists primarily of acidic gases and is removed via a degassing dome, and - a second liquid phase or dispersion, where a part of the recyclable plastics is present as melt, (v) in a third heating zone or a third heat exchanger, respectively, the second liquid phase is melted further at a temperature of 300°C to 380°C and subsequently, together with already formed vapour containing hydrocarbons, (vi) supplied to a cracking reactor inside which the melted hydrocarbons are cracked at around 400°C in a purely thermolytic way, wherein the gaseous hydrocarbons are supplied to a partial condenser inside which long-chained hydrocarbons condens and are returned to the third heating zone or the third heat exchanger, respectively, (vii) the gases are supplied from the partial condenser to a distillation column, inside which they are separated in a gaseous and a liquid fraction and from which the liquid fraction is removed as product diesel and the gaseous fraction as low boiler.