The invention relates to a one-stage system for concentration and purification of concentrated hydrogen peroxide, in particular for production of concentrated solution of HTP (High Test Peroxide) grade hydrogen peroxide of concentration of at least 98% for propulsion applications, comprising heating means, a water bath, a rotating flask with a drive in a sloping position at an angle from 105° to 140° with respect to the fractionating column, a condenser, a distillate receiver, characterised in that it additionally comprises a stationary flask (4) placed between the fractionating column (7) and the rotating flask (3) for placing the feedstock, and above the fractionating column (7) and before the condenser (10) it comprises a condenser controlled by the flow rate of the cooling liquid (8), and further behind the condenser (10) and before the stopcock (11) shutting off the main receiver (12) it comprises an auxiliary condenser (13) that from one side is connected to vacuum, and from the other side it is connected to an auxiliary receiver (15), whereas the fractionating column is an adiabatic fractionating column (7), and the final product is received from the flasks (3) and (4). Additionally, the invention comprises a method for production of concentrated solution of hydrogen peroxide, in particular of HTP (High Test Peroxide) grade of concentration of at least 98% for propulsion applications, in a system according to the invention, in which the one-stage process of production of concentrated hydrogen peroxide solution by concentration and purification of hydrogen peroxide solution is carried out.
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