On the basis of discussing the testing technology for high sulphur gas well and influential factors of data interpretation in detail, we deeply researched and analyzed the blowout path, gas combustion technology, testing flowline and well test interpretation method, and then created a new test process with EE and HH corrosion resistant degree, combustion mode for gas incinerator and modified isochronal test technology. All these technologies have been used successfully in Puguang P302-2, gained reliable test data, and built the modified deliverability equation with these test data. And storability in Puguang Gas Field has been further confirmed by the equation. It is also significant for developing new high sulphur gas field.