Nigel Baldaro has repeatedly dug into rock faces along the World Heritage Site in Dorset in search of new specimens.
But his actions breached the West Dorset fossil collecting code of conduct and led to accusations he was putting lives at risk by loosening rocks.
The National Trust, Natural England and Charmouth Parish Council jointly applied for an injunction which was granted at Taunton Crown Court.
Baldaro, of Crewkerne, Somerset, is now banned from collecting fossils from private land along the Jurassic Coast.
Speaking after the hearing National Trust property manager Helen Mann said: ''These injunctions are not about stopping people picking up the fossils on the beaches.
''We know thousands of families enjoy collecting fossils as a memento of their visit to the Jurassic Coastline and this is a valuable educational activity for many families and schools.
''This is about preventing inappropriate and unlawful fossil collection which damages the coastline.
''Wholesale digging into the cliffs, prospecting along fossil-rich layers, is dangerous and unacceptable on this World Heritage Site coastline.''
If Baldaro breaches the order he will be in contempt of court and could be arrested and charged.
A second injunction was also issued against ''persons unknown'' to prevent other fossil hunters from digging along the cliffs.
* A 95-mile area of the Jurassic Coast was made England's first natural UNESCO World Heritage Site in 2001, after several finds of breath-taking dinosaur fossils.
In May 2008 a 400m stretch of the Jurassic Coastline was destroyed by a huge landslide involving rocks dating back 185 million years.