▎ 摘　　要

NOVELTY - The method involves analyzing (S1) global navigation satellite system (GNSS) statement output after positioning a Global Navigation Satellite System (GPGGA) time-service receiver. Current time information is displayed. Standard second pulse and a local frequency division second pulse are connected (S2) to a measuring channel and a channel 3 of a TDC-GPX2 high precision time interval. A measuring chip register of a transistor- tungsten- graphene high-precision time interval measuring module is initialized (S3). The standard second pulse rising edge and the local sub-frequency rising edge measuring value are read (S4). An average filter processing is performed. A correction value is calculated by a PD algorithm processing module. A current crystal oscillator output frequency value, a frequency average value and a frequency accuracy value are displayed (S6). USE - High-precision clock taming method. ADVANTAGE - The local crystal oscillator keeps high stability of itself short term and also has high accuracy of characteristics second pulse for a long time, reducing the purchase cost of the high performance frequency scale, making the output frequency close to the first level frequency standard level. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating high-precision clock taming method. (Drawing includes non-English language text). S1Step for analyzing global navigation satellite system statement output S2Step for connecting standard second pulse and local frequency division second pulse S3Step for initializing measuring chip register of transistor- tungsten- graphene high-precision time interval measuring module S4Step for reading standard second pulse rising edge and local sub-frequency rising edge measuring value S6Step for displaying current crystal oscillator output frequency value, frequency average value and frequency accuracy value