The invention discloses a triple PCR primer for synchronously detecting strawberry phytophthora and raspberry phytophthora as well as an amplification method and application thereof, and relates to 3 sets of primers, namely, a phytophthora universal primer, a strawberry phytophthora-specific primer and a raspberry phytophthora-specific primer, wherein the universal primer is used for controlling the quality of mycelium genome DNAs for establishing triple PCR molecular detection; through agarose gel electrophoresis observation, a 884bp amplied fragment shows in the PCR product of phytophthora strains, strawberry phytophthora has specific fragments of a 615bp specific fragment shows in the PCR product of strawberry phytophthora, and raspberry phytophthora has specific fragments of 559bp; three sets of primers can be effectively used for mycelium genome DNA of the two kinds of phytophthora for triple PCR specific amplification.