Abstract: A drawer slide assembly comprises: an outer slide; an intermediate slide; an inner slide having a protruding block mounted on one end thereof; and a sequence control device to enable the outer slide, the intermediate slide, and the inner slide to be pulled out sequentially. The intermediate slide and the inner slide are mounted inside the outer slide and the inner slide is mounted inside the intermediate slide. A guide plate is mounted on the outer slide. A positioning trench having an expansion trench is formed on a top surface of the guide plate. A shrinking opening is formed between the expansion trench and the positioning trench. An elastic restriction means having a pair of oppositely extended stopping means is mounted on the intermediate slide. As a result, the outer slide is prevented from being damaged by heavier weight.