本研究以層級回歸模型探討傳統產業赴大陸投資與兩岸傳統產業貿易之關聯性，並加入簽訂ECFA前後作為虛擬變數，探討ECFA對兩岸傳統產業貿易之影響。研究結果顯示：一、台灣傳統產業赴大陸投資對出口、進口與總貿易均為互補關係。二、簽訂ECFA後，傳統產業出口至大陸為顯著負向關係；而簽定ECFA後，自大陸進口則呈現顯著正向關係；至於對兩岸貿易總體則呈現負向不顯著關係。

This study research the relationship between Taiwan’s traditional industry direct investment in china and cross-strait traditional industry trade by using Hierarchical regression analysis with the signing of ECFA as a dummy variable to analysis the effect of ECFA. Empirical results reveal the following statement: 1. Taiwan’s traditional industry investment will complement the export, import and overall trade between Taiwan and china. 2. It has a significant negative relationship after signing ECFA on export trade; it has a significant positive relationship after signing ECFA on import trade; it has a negative but not significant relationship after signing ECFA on cross-strait trade.