An anti-Reagan protest and a school safety patrol parade are expected to draw thousands of people to downtown Washington tomorrow.

A spokesman for the organizers of the demonstration against the foreign and domestic policies of President Reagan said that the event is expected to draw a crowd of 30,000 people.

The protest, organized by the Washington-based All People's Congress, will include a rally near Union Station and a march to the west side of the Capitol, according to spokesman Brian Becker.

The march will begin at about 1 p.m. in Franklin Park, 14th and K streets NW. Marchers will proceed along 13th, F, Seventh, E and First streets NW to the Capitol.

Thousands of others will be on Constitution Avenue NW to mark the Washington area's 50th annual School Safety Patrol Parade.

Cosponsored by the American Automobile Association and the Washington police department, the parade will begin at 10 a.m. and is expected to attract about 40,000 onlookers, said Officer Lanier Bryant.

More than 10,000 youthful members of safety patrol units and marching bands from public and parochial schools throughout the Washington area are scheduled to participate in the parade, she said.

Mickey Mouse and Minnie Mouse characters will lead the parade aboard a float that will get under way at Seventh Street and Constitution Avenue NW and cruise to 17th and Constitution.