An Upper East Side woman jumped to her death from an 18th-floor balcony early today after getting into a heated argument with her mom in their Trump Palace condo, polices sources said.

Yee-Ping Yang, 43, had been drinking at 1:45 a.m. when she clashed with her mother, Mu-Hsiang Chow, in their posh pad at 200 E. 69th St., where apartments go for as much as $15 million, sources said.

During their confrontation, Yang threatened to jump off the balcony if her mom left the apartment, sources said.

When Chow walked to the front door, Yang rushed to the balcony and leaped over the edge, sources said.

She plunged to her death on a ninth-floor balcony, where her mangled body was recovered, sources said.