This research was conducted on Apricot trees "Solitaire" cultivar four years old, grafted on Nemguard rootstock 4*5 m apart (210 trees/feddan) in sandy soil at the private farm of Assiut governorate, Egypt during two successful seasons (2021/2022 and 2022/2023). Solitaire apricot trees were treated with different summer pruning treatments as follows: 1- head back pruning (HB) (0, 15, 30 and 45%), 2- thinning pruning (TP) (0, 25 and 50%). The main purpose of this trail is to study the effect of summer pruning on the Solitaire vegetative and fruit growth behavior to preserve the physical and chemical characteristics of tree growth, increase yield, and raise economic value. The results showed that a combination of 30% head-back pruning with 25% thinning pruning improved the tree the highest physical and chemical characteristics which reflect on the vegetative, flowering and fruiting quantity and quality compared to the other pruning treatments under the study.