Doctors at ShaukatKhanamHospital here said the cricketer-turned-politician was fitted with a specially designed brace or spinal support this morning and he walked unaided for over 300 metres.
The brace allowed Khan to stand upright and unsupported for the first time since his accident two weeks ago.
He was pain-free while walking with the aid of the brace, the doctors said.
The hospital's administration said Khan is expected to be discharged on Wednesday afternoon though he would continue to receive regular physiotherapy.
Khan would have to wear the brace for four to six weeks, doctors said.
The 60-year-old was ordered by doctors to remain immobile after he fractured several vertebrae and a rib when he fall from a fork lift that was raising him to a stage at an election rally days before the May 11 polls.
The general election was won by the PML-N led by former premier Nawaz Sharif while Khan’s party finished in third place in the National Assembly or lower house of parliament.
The Pakistan Tehrik-e-Insaf is also set to form government in the militancy-hit Khyber-Pakhtunkhwa province.
President Asif Ali Zardari telephoned Khan and inquired about his health. Zardari also prayed for Khan's early recovery, presidential spokesman Farhatullah Babar said.
The President felicitated Khan for the confidence reposed in him by voters, particularly in Khyber-Pakhtunkhwa, Babar said.
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