The performance of self healing concrete can be affected by various factors. In order to explore how the factors like external environmental conditions, initial width of crack and placement method of fiberglass tubes affect the performance of self healing concrete, the self repairing test was conducted by using the self healing concrete specimens with the Great Wall 717 as the repairing adhesives and the fiberglass tubes as carriers. The rate η of the flexural strength after being repaired(f1) and the initial flexural strength of the control group(f) was used to characterize the repairing performance, through which the relationship between these three factors and the performance were analyzed. Results show that the repairing effect increases as the external environmental conditions(temperature) increase, under the condition of special fiberglass tube placement method and initial width of the crack, the performance at 30℃ is 133% higher than that at -15℃; the smaller the initial width of the crack is, the better the repairing effect will be. The microcrack with initial width of cracks of 10mm or below can be repaired by the self healing concrete. When fiberglass tube is placed in a shape of trapezoid, the performance will be better than that of the rhombus. The placement method of fiberglass tubes plays a dominant role in the self healing process when the intial width of the crack is up to about 20mm.