For calculation of repair effect of the self repairing concrete,10groups of concrete specimens were designed. Through controlling the crack width of the specimens, concrete repair tests of different loading forms(bending and shearing) were carried out, and the calculation formula of repair effect was put forward. The calculated value obtained from the concrete repair effect expression is basically in agreement with the test value. The actual test value does not exceed 397% of the calculated value. The difference between them can be used as a safety reserve.