The invention discloses a double-helix type coin sorting machine including a frame housing, a digital display counter, a coin storage box, a laser probe, a small one-jiao channel, a five-jiao channel,a big one-jiao channel, a one-yuan channel, a small one-jiao sieve tray, a five-jiao sieve tray, a big one-jiao sieve tray, a one-yuan sieve tray, a rotating shaft, a driving mechanism and a funnel.The small one-jiao sieve tray, the five-jiao sieve tray, the big one-jiao sieve tray, and the one-yuan sieve tray are stacked from bottom to top, a plurality of screening holes corresponding to the coins are formed in the five-jiao sieve tray, the big one-jiao sieve tray, and the one-yuan sieve tray, the plurality of screening holes are arranged in an archimedean double helix, and a baffle plate which is arranged in an archimedes double helix is arranged on the small one-jiao sieve tray. According to the method for sorting the currency value according to the size of the coin diameter, the gearspeed reducer is adopted for transmission, and by means of the archimedean double-helix structure, the coin screening efficiency is greatly improved, and Chinese current coins can be sorted rapidly and accurately according to the currency value.