Formula of composite coptidis rhizoma liquid and preparation method

The invention relates to a formula of composite coptidis rhizoma liquid and a preparation method. The composite coptidis rhizoma liquid is characterized by being prepared from, by weight, 80-100 partsof coptidis rhizoma, 27-34 parts of radix scutellariae, 27-34 parts of cortex phellodendri, 27-35 parts of fructus gardeniae, 27-33 parts of radix sanguisorbae, 27-34 parts of giant knotweed rhizomes, 27-34 parts of milkvetch roots and 9-12 borneol. The making method comprises the following steps that 1, coptidis rhizoma, radix scutellariae, cortex phellodendri, fructus gardeniae, radix sanguisorbae, giant knotweed rhizomes and milkvetch roots are taken, two times of water is added, steaming is conducted at 100 DEG C for 10 min, the above mentioned medicines are taken, 10 times of water is added, extraction is conducted at 100 DEG C for 125 min, liquid medicine is filtered out for use, and medicine residues are obtained; 2, the medicine residues in step 1 are taken, 8 times of water is added, extraction is conduc