The invention provides a plastic trumpet which solves the problems that trumpets in the prior art are complex in structure, high in production and maintenance cost, high in weight, short in service life and unreasonable in
airflow direction. The plastic trumpet comprises a
mouthpiece, a tube body, a vertical key
piston device, an auxiliary tube and a horn mouth, wherein the tube body is connected with the
mouthpiece, the vertical key
piston device is connected with the tube body, the auxiliary tube is connected with the vertical key
piston device, and the horn mouth is connected with the tube body; the
mouthpiece, the tube body, the auxiliary tube and the horn mouth are all made of plastics. According to the plastic trumpet, most of production procedures are completed through machinery equipment, time and labor are saved, production efficiency is high, the product percent of pass is high, quality is good, environment friendliness is achieved, manufacturing processes are simple, material and production cost is low, the weight is low, and the plastic trumpet is convenient to use and carry, waterproof, free of influences of collision, resistant to acid, alkali and
corrosion, long in service life and nearly free of maintenance, and is prevented from dropping; meanwhile, the
airflow direction is reasonable and smooth, and the plastic trumpet is a rare improved product.