The invention discloses a myricaria laxiflora plug cutting propagation method which includes the steps: cutting preparation: cutting annual lignified branches to serve as cuttings with the lengths of4-5cm; cutting inserting: inserting the cuttings into plugs with substrates, and placing the plugs into a plastic greenhouse; branch management after cutting inserting: watering the cuttings after cutting inserting every day, spraying ammonium polyphosphate water-soluble fertilizers 5-7days after cutting inserting, spraying the fertilizers once every 5-7 days, and continuously spraying the fertilizers for 3-4 times; alternately spraying ammonium polyphosphate and monopotassium phosphate, spraying one of the ammonium polyphosphate and the monopotassium phosphate once every 5-7 days, and continuously spraying one of the ammonium polyphosphate and the monopotassium phosphate for 3-4 times to complete myricaria laxiflora plug cutting propagation. Results of average rooting rate, the number ofbranches of primary average rooting and transplanting survival rate show that myricaria laxiflora plug cutting effects are the best by the aid of plugs with the specification of 128 holes, cutting slips without being treated by any endogenous hormone and sediment substrates.