The purpose of this study was to examine the effects of the type and delay intervals of KR on timing task learning. The subjects were 120 students aged 11~12 . All partivipants were males and right handed. Subjects were tole that their tasks were to press the button in a precise moment when the target light on the runway was illuminated. The subject performned the anticipation timing task under 224cm/s. The apparatus was an Bassin Anticipation Timer and timing error was calculated as the time difference between the target light and the button press. During the twenty-trial acquisition phase, the subjects were provided according to three different type of KR(every practive trial, bandwidth KR. reversed bandwidth KR) four different delay intervals(immediately 4,8, or 12 sec after completing trial). The bandwidthe KR groups was provided KR if the timing error exceeded 10 percent of presentation time of target light. The reversed handwidth KR groups was provided KF if the timing error was sithin 10 percent of presentation time of target light. The findings showed that the bandwidth and reversed bandwidth groups performed better in acquisition and retention phase than did every pracice trial groups.