A master's dissertation was discussed in the College of Engineering, University of Al-Qadisiyah on of the effect of Nano-freezing fluid on the performance of the compressive freezing system by the postgraduate student, Mrs. Rawnaq Khaled Mahmoud. The dissertation aimed at designing and manufacturing a compression freezing device, preparing three types of Nano fluids with different concentrations, adding them to the R134a base coolant and testing their effect on the compression freezing system to identify the best physical properties of Nano fluids and prove that the use of Nano fluids achieves an improvement in the performance of the system of compression cooling. The dissertation demonstrated testing the effect of adding aluminum oxide (AL2O3), zinc oxide (ZnO) and titanium oxide (TiO2) at three concentrations (0.2%, 0.4%, 0.6%) for each type of Nanoparticles dispersed in compressor oil (PAG) as a base fluid and added to the coolant R134a in a compression freezer and its effect tested at three temperatures of the water in the evaporator (40oC, 50oC, 60oC). The dissertation concluded that increasing the performance coefficient of the system via using AL2O3 Nanoparticles is better than ZnO and TiO2 Nanoparticles with the highest increase in the performance factor was reported by 32.219% at a concentration of 0.6% of AL2O3 fluid and a temperature of 40°C for the water in the evaporator and the highest increase in the cooling effect by 17.202% at a concentration of 0.6% of AL2O3 particles at a temperature of 60°C. The dissertation recommended using of new types of Nano fluids with another type of coolant and the study can be conducted via using other types of compressor oil, as well as using Nanoparticles in evaporator water.