Drilling process under oblique rock and reef environment

The invention discloses a drilling process used in an inclined rock and reef environment, which comprises the following steps of: drilling: positioning a drilling position and the periphery of a drilling hole by using positioning equipment, and after positioning, performing low-speed and then accelerated drilling on the inclined rock and/or reef by using a drilling technology so as to form a hole meeting the perpendicularity; the core column is taken out, specifically, the whole core column drilled in the drilling position is subjected to whole core drilling through the core drilling technology, then the whole core column is screwed into sections through a core taking cylinder, and then the whole core column is taken out; and hole bottom sweeping is conducted, specifically, hole bottom sweeping is conducted through a slag fishing barrel, and then vertical drilling under the oblique rock and reef environment is formed. According to the method, by means of the steps of drilling and coring firstly and then drill