Drought, currently affecting one-third of the world, prevents plant establishment and restricts plant growth and plant yield in some areas as a result of drought stress. Drought stress is one of the most important limiting environmental factors in development of urban landscape. Therefore, choosing proper trees and plants is of great importance. considering the impact of green spaces in urban environments and plants as their essential components together with geographical, social and arid climate of Iran and its limitations. Although olive tree is fairly drought tolerant, optimization, adaptation and resistance to drought stress in these species should be one of the priorities of management urban landscope. This study was conducted to, investigate the effects of trunk injection treatment with calcium silicate, potassium silicate, potassium aminoclate and seaweed extract on improvement of drought stress in olive trees in urban landscope. The experiment was completely randomized block design. Treatments consisted calcium silicate in five concentrations of 0.25, 0.5, 1, 2 and 4% by volume, potassium silicate in five concentrations of 0.25, 0.5, 1, 2 and 4% percent volume, potassium aminoclate in five concentrations of 0.25, 0.5 0, 1, 2 and 4% volume,and seaweed extract at five concentrations of 0.25, 0.5, 1, 2, and 4% volume each treatment included four trees as the replication. Control irrigation as weekly irrigation. The effects of treatments on photosynthetic pigment indices including chlorophyll a, chlorophyll b, total chlorophyll, carotenoid and vegetative index and physiological indices including electrolyte leakage, relative leaf water content, proline content, malondialdehyde content and chlorophyll fluorescence were measured and The results indicated that trunk injection of potassium aminoclate at 2% concentration increased leaf vegetative index, relative water content of leaf and proline and decreases electrolyte leakage index and malondialdehyde content compared to drought control. Calcium silicate trunk injection at 4% concentration significantly increases chlorophyll a, carotenoids, leaf vegetative index and proline content as compared to control treatment and reduces malondialdehyde and electrolyte leakage. Injection of potassium silicate with 2% concentration increases photosynthetic pigment content and proline and decreases malondialdehyde and electrolyte leakage at 1%. Seaweed extract treatment with trunk injection was generally effective on the improvement of photosynthetic pigments index and relative leaf water content and proline content and reduced of malondialdehyde and electrolyte leakage. In general, using investigated treatments in this study to protect photosynthetic pigments under drought conditions improves plant photosynthesis; it also helped the plant to resist the harmful effects of drought stress by preserving osmotic potential, increasing proline content and preventing relative leaf water content reduction and electrolyte leakage as well as preventing an increase in malondialdehyde. Keywords bio-stress, malondialdehyde, landscape, photosynthetic pigments, trunk injection