Triloki Tiwari, posted as head constable, sustained serious injuries after he was crushed by the van carrying cattle at Badlapur check point in the wee hours, police said.
Tiwari was rushed to the district hospital and later reffered to Varanasi, where doctors declared him brought dead, they said.
Superintendent of Police Atul Saxena said Tiwari, hailing from Kaimur district in Bihar, was posted at Saraipokhta outpost for several years.
He said that a wireless message was received this morning around 3 AM that smugglers were transporting cattle in two vehicles.