Transport infrastructure is a basic requirement for tourism development, and it becomes one of the vital components in the “six elements” of tourism. According to the literature review, this paper further explores the interaction mechanism between traffic infrastructure construction and development of China’s forest park tourism based on a provincial panel data in China from 1998 to 2017. The simultaneous equation system model was used to empirically demonstrate the hypothesis of the interaction between traffic infrastructure construction and development of China’s forest park tourism. Estimation results show that 1) generally speaking, the construction of transport infrastructure has a strong promotion effect on the development of forest parks and forest tourism, but the reverse effect was weak; 2) in terms of patterns of forest parks, the construction of traffic infrastructure had a significant interactive relationship with the development of forest park tourism in medium-utilized with comparative advantages and under-utilized areas respectively; 3) from the perspective of forms of transport infrastructure, only highway construction had a significant positive interaction with the development of forest park tourism; from 1998 to 2007, the construction of transportation infrastructure had a significant impact on the development of forest park tourism, but the reverse effect was not significant; and 4) from the view of the cross combination of varieties of transportation infrastructure and forest parks, only railway construction had a significant positive impact on tourism development in the high-utilized areas of forest parks with comparative advantages; highway construction had a significant positive impact on the tourism development of forest parks, specifically for systemized highways. In this regard, this paper suggests to further improve the construction of transport infrastructure and to innovate the tourism formats of forest parks in accordance with local conditions.