Abstract: Two series of studies were undertaken. Study I, using longitudinal method,the speeches of five 0.5-3(1/2) yrs old children were recorded. The resultsindicated: Chinese-speaking children master personal pronouns step by step inthe period of 1(1/2)-3(1/2) yrs old. The order of mastering is from "I" "You" to "He".Study 2 investigated twenty eight 3-4 yrs old children's acquisition of per-sonal pronouns (singular number) by experimental method. The results showed:In the process of acquisition of personal pronouns,the fourth year is a rapidlydeveloping period. In this age children have a good command of personalpronouns. On the basis of the above research, the characterisitics and laws ofchild's acquisition of personal pronouns and language universalitywere exploredand generalized.

Key words: acquisition of personal pronoun, direct call, I"You pronoun-reversing, unclear reference, post-reference, Ianguage universality