The invention discloses a liquid feed distributor for a lamella heat exchanger, comprising a feed access pipe and a feed distribution pipe. The liquid feed distributor is independently arranged outside a gas pipeline, and the feed distribution pipe of the liquid feed distributor is provided with a plurality of rows of distribution holes along the radial direction; one end of the feed access pipe of the liquid feed distributor is communicated with the pipe wall at the outer end of the feed distribution pipe; the feed distributor is connected with a plate bundle of the lamella heat exchanger through the feed distribution pipe; a part of the plurality of distribution holes of the feed distribution pipe along the radial direction are positioned in the plate bundle; both the outer end of the feed distribution pipe and the feed access pipe are positioned outside the plate bundle; and the outer end of the feed distribution pipe is provided with an end flange. The invention can solve the problem of distribution dead zones in the center of an original distributor structure and reduce the overhaul workload and the overhaul difficulty of the distributor on the premise of realizing uniform distribution.