The utility model discloses an expelling parasite subsides for municipal garden, including a support, the centre of support sets up one and leads to the groove, it sets up the cavernosum that absorbs water to lead to the inslot, absorb water the cavernosum four lateral walls respectively with lead to inslot wall fixed bonding, the top of support sets up a drug storage box, load the helminthogogue agent in the drug storage box, a weeping aperture is seted up to drug storage box's bottom, the weeping aperture communicates with each other with logical groove, drug storage box's top sets up a fixed establishment. The utility model discloses simple structure, to the trees that need the expelling parasite, as long as will the utility model discloses a press direct attachedly in corresponding the position, because contact pin length is shorter, consequently only can insert gently in the bark top layer to can not cause the injury to the bark inlayer, it is safe in utilization, just the utility model discloses it is small, hang and put simply, can place in any position, the cost of manufacture is low.