Chinese Overseas Economic and Trade Cooperation Zones (COCZs) under the “One Belt and One Road” initiative are committed to promoting inclusive and sustainable industrialization, becoming an important platform for the countries and regions where they are located to achieve the sustainable development goals of the 2030 agenda. The planning of COCZs plays a strategic leading and rigid control role in the sustainable development of parks, and the planning implementation effectiveness evaluation has been a key to the sustainable development of COCZs. From the perspective of sustainable development, we established a rating system depending on the deconstruction “effectiveness = efficiency + effect + benefit + capacity” to measure the planning implementation effectiveness evaluation indexes of COCZs, and conducted empirical research based on the evidence of Longjiang Industrial Park, Vietnam. The research results show that Longjiang Industrial Park has a good planning implementation effectiveness with remarkable comprehensive economic, social, ecological and political benefits. It features a good efficiency, effect and benefit from an excellent production capacity, reflected in the consistency between spatial planning and implementation results and a high satisfaction with planning implementation. However, planning implementation is also faced with problems such as the lag of time, imbalance between profit and loss, uneven achievement of goals, and lack of a refined planning control system. To make COCZs more sustainable in development and planning, the suggestion is, on the one hand, to accelerate the establishment of a regular and institutionalized mechanism for the planning preparation and implementation evaluation of COCZs, and bring sustainable development into the management requirements, and, on the other hand, to promote the transformation of COCZs planning from “Function and Scale Orientation” to “Quality and Effectiveness Orientation”, and guide the creation of a model for sustainable development and the planning of COCZs.