Mayor Marion Barry and D.C. Police Chief Manurice T. Turner, in the second press conference in two days on methods of fighting crime, urged city employes yesterday to help the police by reporting crimes or any suspicious activities they may see while they are on duty.

"We need your eyes and ears to help us," said Turner, speaking to more than 200 city employes gathered at the Department of Environmental Services headquarters in Blue Plains.

The employes were representatives of 18 city agencies, including sanitation, transportation, housing, recreation, corrections, environmental services and the fire department. These agancies have the use of about 1,200 city vehicles, all of them equipped with two-way radios.

Under the program, a driver of a city vehicle who spots criminal or suspicious activity is asked to call the dispatcher, who will alert police.

The enlisting of aid from the city employes, called INFACT -- which stands for information Network for Attacking Crime Together -- is part of a 13-point crime prevention plan started in February.

Last month, Turner said the INFACT program had not been as successful as officials had hoped, and yesterday's meeting of the mayor and city employes was an attempt to rally support.

"Our crime problems are extensive," Turner said yesterday. He said 53,000 major crimes were reported in 1980, and a large percentage of those crimes were burglaries and larcenies.

"If I don't do anything else during my term as mayor, I'm going to reduce crime," Barry told the assembled crowd. "You can help because you are part of the family."

On Tuesday, the mayor and the chief unveiled the "Crime Solvers" program in which citizens may receive as much as $1,000 for tips that lead to solution of serious crimes in the District.