Dumping means generally that an exporting company sells its goods to importing country at the lower price than the normal price in exporting country. It is a kind of price discrimination between domestic market and foreign market. It, in the most case, can deteriorate employment in the importing country, and also can injury the like industry in the importing country. Therefore, dumping is condemned by the international business societies as a typical unfair trade practice, and WTO member countries are allowed to relieve their domestic industry in case foreign exporting company sell its products at the dumping price, using their antidumping duty measures. As we know well, China is one of the nation that files most frequently foreign exporting companies on suspicion of dumping in Chinese market, and also China belongs to the nation that is most frequently filed as suspect of dumping in foreign market. Of course, the reason why China is the main suitor of dumping among WTO member countries is China's strong position to protect domestic industries by taking measure against foreign possible dumping companies, using its antidumping law and regulations. Recognizing this point, main aims of this thesis is to examine Chinese laws of dumping regulations, namely, China's antidumping regulations, and investigate the main suit cases of antidumping against foreign companies. By doing so, the author try to find problems and present the schemes to improve China's antidumping laws. As the results of this study, the author can find several important problems of China's antidumping laws and the schemes that should be improved, as follows. First, China's antidumping laws and system are too much complicated, and some important articles which are necessary to clearly decide existence of dumping or actual injury in domestic like industries. Therefore, foreign companies exporting to China feel much difficulties to understand China's antidumping laws and prevent in advance china's antidumping measures. Second, many WTO member countries recognized China as a market-oriented economy, but even recently China is classified as non-market economy and recognized that China is controlling market price positively. So, it is quite difficult for other countries to apply proper standards in process of deciding existence of dumping or injury in China's market. Third, there is no judical review systems in China, and China is being suspected that China's antidumping systems are deficient of objectivity and fairness. Therefore, China should establish a judicial review systems in relation to antidumping measures.