This resarch aims to find out whether or not the impelementation of Rainbow Dots Strategy can improve reading comprehension of the second grade students of SMP Negeri 5 Palu. The research design is Pre-experimental design. The population of this research is the second grade students of SMP Negeri 5 Palu. The researcher takes the students in class D as the sample by using purposive sampling technique. The data are collected through pretest and posttest. The pretest is conducted to measure the students ability before treatment, and posttest is administered to measure the students after treatment. Based on the result of the test, the mean score of pretest is 33 while the mean score of posttest is 54.625, so the mean score increases from pretest to posttest about (21.625). Furthemore, the researcher found that t-counted is 12.21 by applying 0,05 level of significance and 15 degree of freedom (df), the researcher found that t-table is 1.753. It means that t-counted is higher than t-table. In conclusion, the hypothesis of this research is accepted and the use of Rainbow Dots strategy in improving reading comprehension of the students is effective.