A process for continuous modification of starch, comprising the steps of: a) mixing starch in powder form having a moisture content between 9% and 25% with an alkaline water solution to obtain a wet powder; b) feeding a continuous flow of said wet powder into a continuous dryer together with a continuous flow of hot air, said flow of hot air having a temperature between 100°C and 160°C; c) discharging a continuous flow of dried powder from said continuous drier, said dried powder having a moisture content between 2% and 4%, preferably between 2.5% and 3%; d) providing a turbo-reactor comprising a cylindrical tubular body having at least one inlet opening for the introduction of said continuous flow of dried powder and at least one discharge opening, a heating jacket for bringing the temperature of said tubular body to a predetermined temperature and a rotor, disposed in the cylindrical tubular body and comprising a shaft provided with elements projecting radially from it; e) supplying said continuous flow of said dried powder into said turbo-reactor, in which the inner wall of said turbo-reactor is maintained at a temperature between 150°C and 250°C, preferably between 180°C and 230°C, by means of said heating jacket and the rotor is rotated at a speed greater than or equal to 800 rpm, so that said dried powder is continuously centrifuged and advanced inside said turbo-reactor through the action of said rotor for a time between 4 minutes and 7 minutes, preferably between 5 minutes and 6 minutes, and converted into a thermally inhibited starch; f) discharging said thermally inhibited starch from said turbo-reactor. a) mixing starch in powder form having a moisture content between 9% and 25% with an alkaline water solution to obtain a wet powder; b) feeding a continuous flow of said wet powder into a continuous dryer together with a continuous flow of hot air, said flow of hot air having a temperature between 100°C and 160°C; c) discharging a continuous flow of dried powder from said continuous drier, said dried powder having a moisture content between 2% and 4%, preferably between 2.5% and 3%; d) providing a turbo-reactor comprising a cylindrical tubular body having at least one inlet opening for the introduction of said continuous flow of dried powder and at least one discharge opening, a heating jacket for bringing the temperature of said tubular body to a predetermined temperature and a rotor, disposed in the cylindrical tubular body and comprising a shaft provided with elements projecting radially from it; e) supplying said continuous flow of said dried powder into said turbo-reactor, in which the inner wall of said turbo-reactor is maintained at a temperature between 150°C and 250°C, preferably between 180°C and 230°C, by means of said heating jacket and the rotor is rotated at a speed greater than or equal to 800 rpm, so that said dried powder is continuously centrifuged and advanced inside said turbo-reactor through the action of said rotor for a time between 4 minutes and 7 minutes, preferably between 5 minutes and 6 minutes, and converted into a thermally inhibited starch; f) discharging said thermally inhibited starch from said turbo-reactor.