Abstract: In order to further optimize the process of coal and rock coring, the drilling dynamic model of coring bit was established, the factors affecting the drilling process were simulated numerically and the core components of coring equipment were developed.It is concluded that the drilling rate, bit load and cutting angle have great influence on the drilling process.A complete set of equipment for coring while drilling was assembled, and a complete columnar coal-rock sample core with a diameter of 10 mm to 50 mm was obtained by means of simulated surface coring experiment.The underground field experiment for coring while drilling was carried out to test the performance, and 6 groups of measuring points were arranged to measure the gas content.The results show that the coring time is reduced by 1/3; the error of gas content at the measuring point is less than 5%, which verifies the reliability of the performance of the complete set of equipment.