In view of that technical difficulty such as low penetration rate, high failure rate of rotary steering instrument at high temperature and long drilling cycle in drilling horizontal wells of deep shale gas in Daan District block of Zhejiang oilfield, for the purpose of efficient and rapid development of Daan shale gas, the formation characteristic encountered and drilling technical difficulties are analyzed. through wellbore structure optimization, efficient bit optimization, rapid identification of platinum target, horizontal section density reduction and speed increase, surface temperature reduction of oil-based drilling fluid, high temperature resistant white oil-based drill fluid system and constant wall thickness screw technology are studied and apply, and excellent and fast drilling technology for deep shale gas horizontal wells in Daan District is formed; The technology has been tested in the ultra-deep shale gas horizontal well Da 'an 104H in Daan District, western Chongqing, and the actual drilling depth is 6789m The results show that the drilling speed-up technology of horizontal wells in Da 'an 104H ultra-deep shale gas in Daan District can provide technical support for efficient development of Da' an shale gas.