Shenzhen Baili Marketing Services had filed a complaint in May last year, alleging that the exterior design of the iPhone6 and 6 Plus was copied from its 100C model.
Apple appealed the decision after the Beijing Intellectual Property Office granted Baili an injunction on sales of the two devices. The ban was suspended, pending resolution of the appeal.
The Beijing IP Court ruled that the design of Apple's two models could easily be distinguished by consumers, the Wall Street Journal reported.
The decision came soon after a visit to China by Apple chief executive Tim Cook, during which he met top officials and promised to invest more in the country.
China has been one of the markets that Apple has found tough to dominate, with Chinese brands like Oppo, Vivo, Xiaomi and Huawei providing stiff competition.