The second mining area after-mining roadway construction in Hengjian company was taken as an example, based on incomplete geologic information, large roof broken pressure and other problems, the roadway construction under complicated geological conditions was studied. Through optimizing roadway construction sequence, support selection and geological factor control and other technology,  roadway drivage law under complicated condition was mastered, which improved construction technology, ensured the safe and speed of roadway under complex mining conditions, improved the coal recovery rate, reduced the waste of resources.