Abstract: According to an long time support,poor quality,Ilow strength and other problems existed in the temporary support of the machine hea ding gateway,a self-moving temporary support device with reasonable structure ,convenient operation and good application effect was design and development.A well structure system of stepping movement support and advance column were applied to achieve continuous 4 m long tunnel timely pressure temporary support and anchor support supporting work. Mechanical numerical simulation and field tests show that the column meetsthe stability condition,and the I20 a types of l-girder could meet temporary support of existing gateway.The bending moment of rectangular steel tube in the No.5 column was the biggest,the most unfavorable and the design strength design should be strengthened.The temporary support device had simple hydraulic operation,flexible walking motion,reasonable matching size,could well suit condition of the roof and floor,could improve the supporting conditions of fully mechanized coal mining face,could optimize the circulation process ,could increase driving speed 40%,could realize the safe and fast the mine gateway driving.