Shotcrete is utilized in tunneling, maintenance, coating and repair of different concrete structure which are in direct contact with weather conditions and destructive environmental effects and issues concerning their shelf life is always of great interest to researchers. One of the issues which has the biggest destructive effect on concrete structures in cold and wet environments is the sequential cycles of freezing and thawing. The effects of frost can be evaluated by measuring the decrease in compression strength changes in dynamic module of elasticity, length, weight and percent of water absorption of shotcrete specimens. Since the objective of this thesis is evaluating the usage of Nano particles in frost conditions, a constant ratio of water to cement of 0.5 is used in all specimens. The Nano particles used in this study are Nano-silica and Nano-clay particles. In mixing patterns, a pattern without Nano particles, three pattern with 2%, 4% and 6% of cement weight percent and three pattern with the same weight percentages with Nano-clay particles are made. Hence, we will have seven shotcrete mixing patterns. The specimens were tested based on the standards of ASTM C666A. In order to compare the performance of different mixing patterns in frost, change in weight, length, percentage of water absorption, compression strength and dynamic module of elasticity are investigated before and after frost. In this research, it was shown that Nano particles improve the durability of shotcrete significantly against frost. It also is observed that, replacing clay and silica Nano particles with cement in specimens, which are treated in water, has increased compression strength and dynamic module of elasticity and decreased the amount of water absorbed. Among all mixing patterns, shotcretes with 6% of Nano silica had the best performance and has increased compression strength and module of dynamic elasticity by 43% and 17% respectively, and decreased the water absorption by 40%.