The invention relates to a well completion method with reservoir protection and packing functions. The well completion method primarily comprises the following steps that 1, well drilling is conducted, specifically, each reservoir is completely drilled through to the total depth or the reservoir is completely drilled through without reaching the total depth or the reservoir is incompletely drilled through; 2, well logging is conducted; 3, open hole perforation is conducted; 4, a barrier is built, specifically, the liquid barrier is built and designed in a well; 5, high-energy gas fracture is carried out, specifically, high-energy gas fracture is carried out on at least one reservoir one time, and artificial cracks are formed; 6, if each reservoir is completely drilled through without reaching the total depth or the reservoir is incompletely drilled through in the step 1, drilling continues till the total depth is reached; 7, well cementation is conducted, specifically, a cement ring is formed in the annular space between a casing pipe of each reservoir and the well; 8, casing pipe perforation is conducted, specifically, a duct between each reservoir and a shaft is built; and 9, the reservoirs are put into production or injection. The well completion method is short in construction period, small in number of procedures and low in cost. By means of the well completion method, the absorption and seepage capacities of the reservoirs can be greatly improved, and great economic benefits are achieved.