The edited footage showing the death of Xu Chunhe, 45, was broadcast as police declared that his shooting was "legitimate" following an internal investigation, state broadcaster CCTV reported.
Xu's shooting earlier this month provoked a media outcry over authorities' reluctance to release surveillance footage, and highlighted the increasing arming of Chinese police in the wake of several deadly train station attacks.
The video showed plainclothed staff preventing Xu - who police said was drunk - from boarding a train, angering the father of three, who is shown punching an officer in the station's waiting room.
Xu is then shown grabbing the baton from Li and apparently
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hitting him with it before the officer draws a gun.
The next image broadcast - a blurry time-stamp suggesting a six-second gap - showed Xu collapsed on a bench. His mother drags the baton from his grasp and hits him with it as he dies.
Provincial police said that Li had given Xu "multiple warnings" before opening fire.
A lawyer for Xu's family, Xie Yanyi, told AFP that the video did not reveal the full extent of Li's beating of Xu, and that the circumstances immediately before the shooting remained "unclear".
Xu had a long-running dispute with local officials and Xie said authorities were probably trying to prevent him from travelling to lodge complaints at higher levels.
The practice, known as 'interception,' is common in China but has met with increasing criticism. Several Chinese media outlets speculated that police had used excessive force against Xu.
Regular police in major Chinese cities began patrolling with guns for the first time last year in response to a deadly mass knifing blamed on separatists from the northwestern region of Xinjiang.