The invention belongs to the field of pectin extraction and manufacture and in particular relates to a process for producing liquid pectin. The process comprises the process steps: crushing the peel raw materials, digesting, performing primary filtering, extracting, performing secondary filtering, performing third-stage filtering, discoloring, desugaring, concentrating and filling. The process for producing liquid pectin is easy to operate and rapid in reaction, discoloring and desugaring are performed by utilizing an ion exchange column, the discoloring degree is high, impurities are prevented from being entrained, sieve concentration is repeatedly performed through molecules, the water, pigment, salt, sugar and small molecular substances can be completely removed, a high-purity pectin solution is obtained, the liquid pectin is filled in a vacuum mode, the outside pollution bacteria are isolated, and compared with the pectin powder, the liquid pectin is convenient to use and fast in absorption.