By means of contrast experiments of ring-type test,the effect of polypropylene(PP) fiber with different volume fractions on dry-shrinkage cracking mode of cement mortar was studied.It is found that more addition of PP fiber leads to later present of the first cracking of cement mortar.Moreover,all specimens reinforced with different volume additions of PP fiber performs multi-cracking mode with several fine cracks. The mechanism of differen additions of PP fiber on restricted dry-shrinkage cracking of cement mortar and the reason of the multi-cracking are also discussed.