The complete orbital and spin period evolutions of the double neutron star (NS) system PSR J0737–3039 are simulated from birth to coalescence, which include the two observed radio pulsars classified as primary NS PSR J0737–3039A and companion NS PSR J0737–3039B. By employing the characteristic age of PSR J0737–3039B to constrain the true age of the double pulsar system, the initial orbital period and initial binary separation are obtained as 2.89 h and 1.44 10⁶ km, respectively, and the coalescence age or the lifetime from the birth to merger of PSR J0737–3039 is obtained to be 1.38 10⁸ yr. At the last minute of coalescence, corresponding to the gravitational wave frequency changing from 20 Hz to 1180 Hz, we present the binary separation of PSR J0737–3039 to be from 442 km to 30 km, while the spin periods of PSR J0737–3039A and PSR J0737–3039B are 27.10 ms and 4.63 s, respectively. From the standard radio pulsar emission model, before the system merged, the primary NS could still be observed by a radio telescope, but the companion NS had crossed the death line in the pulsar magnetic-field versus period (B – P) diagram at which point it is usually considered to cease life as a pulsar. This is the first time that the whole life evolutionary simulation of the orbit and spin periods for a double NS system is presented, which provides useful information for observing a primary NS at the coalescence stage.

模拟了双中子星 (NS) 系统 PSR J0737-3039 从诞生到合并的完整轨道和自旋周期演化，其中包括两颗观测到的射电脉冲星，分类为主要 NS PSR J0737-3039A 和伴生 NS PSR J0737-3039B。利用 PSR J0737-3039B 的特征年龄来约束双脉冲星系统的真实年龄，得到初始轨道周期和初始双星分离分别为 2.89 h 和 1.44 10 ⁶ km，合并年龄或寿命为得到 PSR J0737-3039 合并的诞生为 1.38 10 ⁸年。在合并的最后一分钟，对应于引力波频率从 20 Hz 变为 1180 Hz，我们提出 PSR J0737-3039 的二元分离为 442 km 至 30 km，而 PSR J0737-3039A 和PSR J0737–3039B 分别为 27.10 ms 和 4.63 s。从标准射电脉冲星发射模型来看，在系统合并之前，射电望远镜仍然可以观测到主NS，但伴星NS已经越过了脉冲星磁场与周期的死亡线（B - P) 图表，此时通常认为它作为脉冲星停止了生命。这是首次提出双NS系统的轨道和自旋周期的全生命演化模拟，为观察聚结阶段的初级NS提供了有用的信息。