The invention discloses a method for carrying out flotation of potassium feldspar under a condition with a neutral pH value. The method comprises the following steps: breaking and grinding a materialcontaining potassium feldspar to prepare ore pulp containing potassium feldspar; adding modified oleic acid and petroleum sodium sulfonate into the ore pulp containing potassium feldspar, carrying outflotation and removing iron-containing impurities and mud-containing impurities to obtain the impurity-free ore pulp; adding sodium oleate, an activator and an inhibitor into the ore pulp, and carrying out rough separation to obtain roughly-separated concentrates and roughly-separated tailings; adding sodium oleate, the activator and the inhibitor into the roughly-separated tailings, and scavenging to obtain scavenged middlings and scavenged tailings; adding the inhibitor into the roughly-separated concentrates, and carrying out concentration to obtain potassium feldspar concentrates. The method is capable of effectively separating potassium feldspar from quartz under the condition with the neutral pH value, and is low in corrosion to flotation equipment and low in pollution to the environment; the potassium feldspar concentrates are high in grade and recovery rate; the potassium feldspar raw ores with content of K2O of 7-10% can be effectively developed and used.