In order to measure low velocity layer, dropping velocity zone, high-speed layer thickness and speed, and provide reference for seismic exploration design shot hole depth and statics, harvesting methods of micro logging was introduced, according to normal problems of micro logging, improvements was put forward. Previous data was taken as example, the explanation method of micro logging was introduced. The micro logging data could help analyze underground optimal shot hole depth more accurately and guide outdoor production effectively, improve production schedule and reduce invalid shot.