Abstract: Studied the development of different fine motors and the relationships among them, as well as their relations to children's academic achievement in elementary school Ss were 151 children aged from 4～8 and 30 university students The tasks testing the fine motors were test of drawing between lines, drawing copying and chopstick using skills The results indicated that: (1) The speed of the development of the abilities from high to low was ability of drawing between lines, drawing copying and chopstick using skills; (2) There were significant correlations between chopstick using skills and ability of drawing between lines, drawing copying Children's ability of drawing between lines and their age can significantly predict the levels of chopstick using skills (3) The children of high academic achievement in elementary school did better in all three fine motor tasks than those of low academic achievement The results suggested that the development of complex implemental skills must base on more fundamental fine motors At the same time, there is strong relation between low grade children's fine motor ability and their academic achievement in elementary school

Key words: fine motor ability, characteristics of chopstick using skills, ability of drawing between lines, ability of drawing copying, academic achievement