Lingxiao Pagoda is the main surviving structure of Tianning Temple in Zhengding. Tall and towering, it pierces straight into the clouds. Standing 40.98 meters high, it is an octagonal multi-storey pagoda built with a combination of brick and wood. The pagoda has nine stories in total. Its lower three floors are brick-built, with brick brackets imitating wooden craftsmanship. From the fourth floor upwards, the brackets and eaves of each storey are all made of wood. Each side is divided into three bays, and doors are set on the four cardinal sides of every tier. The pagoda is hollow inside, with stairways leading all the way to the top for sightseeing.

Starting from the fourth floor, a central wooden pillar rises inside the pagoda core, connected to the rear ends of eight corner beams. This central pillar structure is rarely seen among existing ancient pagodas in China, serving as valuable physical evidence for the study of the history of ancient Chinese tower architecture.

In 1982, during a survey and mapping project by the Hebei Ancient Architecture Maintenance Team, an underground palace was discovered beneath the pagoda foundation and subsequently excavated. A number of relics made of silver, copper and crystal were unearthed, together with two stone śarīra reliquaries inscribed with texts.

Inscriptions on the reliquary dated to the second year of the Chongning reign of the Song Dynasty (1103) record that the pagoda was originally named Huiguang Pagoda. Words on the other reliquary from the sixth year of the Zhenglong reign of the Jin Dynasty (1161) state that "the temple and pagoda were first constructed in the reign of Emperor Daizong of the Tang Dynasty". Therefore, the pagoda was initially built during the reign of Emperor Daizong of the Tang Dynasty. It was designated a Major Historical and Cultural Site Protected at the National Level by the State Council in 1988.