One person was killed and six others injured yesterday when a customer at a roadside vegetable stand in Beltsville accidentally backed her station wagon through the stand and into a car parked behind it, Maryland state police reported.

Witnesses told police that the woman apparently depressed the accelerator of her station wagon rather than the brake, according to Trooper First Class William V. Starvis.

The man who was killed was pinned between the customer's station wagon and a car parked at the stand, located at the Oriental Vegetable Farm, on Cinder Road, off Rte. 1 in a rural section of upper Prince George's County.

The wooden stand was demolished. Starvis said one employe was inside the stand when the accident occurred about 3:45 p.m. He was only grazed as the woman's station wagon came through, the trooper said.

Five of the injured were struck by splinters and other flying debris from the stand, Starvis said. The other injured person, the daughter-in-law of the motorist, was also pinned against the parked car.

The man who was killed was identified as Bong Kun Chin, 46, of Woodbine, Md. Starvis said he was an employe of the stand. All the other injured persons were customers, he said. They were listed as Kim Sung, Chun Sook Chin, Soo Hyun Kim, Yong Im Kim and Kyung Hyun Kim. All were treated at Greater Laurel-Beltsville Hospital and released, Starvis said.

The motorist's daughter-in-law, Myong Na, of Glen Burnie, was flown to Prince George's General Hospital and listed in serious condition.

The driver was identified as Choon Cha Kim, 39, of Glen Burnie.